Slow Roasted Sweet Potatoes with Ginger Lime Butter and Charred Broccoli

By now, given that it’s not only all over Pinterest, but both Saveur and Smitten Kitchen have a version (though to be fair, hers is based on Saveur’s offering), you probably know about slow roasted sweet potatoes which means I am completely overdue unoriginal on trend with this one. But that’s okay. As a scholar of medieval texts, I am nothing if not interested in old material. Besides, this one comes with thanks to Chef Alex Guarnaschelli and her propensity to respond to people’s recipe request tweets – while tweet-stalking fangirling scrolling through my feed last week, I noticed a reader ask advice for a lamb chop dish, and Alex recommended a side of sweet potatoes with a ginger butter.

That was all the light-bulb I needed for how to dress up these already-basically-perfect sweet potatoes, roasted for an agonizingly long time until their sweetness deepens, and their flesh collapses into rich orange velvet, and their skins need the barest flick of a fork to split, and just before serving you can shove them under the broiler just until they start to blister and crackle for extra texture. Ginger would be delightful here, cutting sharply through the butter and the starchy softness of the potato (you keep your fresh ginger in the freezer, right, for easy grating?). I knew immediately I would add some brown sugar, or maybe some maple syrup, but set all that off with a generous grating of lime zest to keep it from becoming just deconstructed sweet potato pie (though honestly, that doesn’t sound like such a bad thing…). And rather than make them play second fiddle to some protein, these would be the central feature of our plates.

An almost-dessert main requires a sidekick to keep it oriented, so our vegetable costar would have to be savory and kicky and intense. I went green. Broccoli, sliced into thick, steak-like slabs to expose flat, crisp-tender centers of each stem, aggressively seared until deeply bronzed, then tossed with a pungent mixture of lime juice and fish sauce for that deep, salty-savory funk. At first taste, N. was thrown off by the sourness of the sauce combination, and I’ll admit, it is strong. But then he kept coming back for more, as the briny strangeness seeped temptingly into the bright florets.

This is a weekend meal to be sure, given the length of time needed for the potatoes. But it’s largely hands off; once you stow them in the oven, glistening with oil and scattered with salt and pepper because we are going to eat every shred of that skin, you can putter around, or sink into a movie, or venture out into whatever sort of garden you might be planning for, or indulge in a cat nap, or continue your binging of season two of Jessica Jones; you are free for whatever needs doing until it’s time to char the broccoli and lick your plate.

Slow Roasted Sweet Potatoes with Ginger Lime Butter and Charred Broccoli
Serves 4
About 2½ hours
For sweet potatoes:
4 large orange-fleshed sweet potatoes, approximately equal in size
1 tablespoon olive oil
salt and pepper
For ginger lime butter:
4 tablespoons unsalted butter, softened but not melted
zest of 2 limes
1 tablespoon grated fresh ginger (keep it in the freezer for easier grating) OR 2 teaspoons ground ginger
2 tablespoons brown sugar or maple syrup
For charred broccoli:
1 pound broccoli
3 tablespoons vegetable oil
2 tablespoons sesame oil
1 tablespoon lime juice
1 tablespoon fish sauce

 

  • Preheat the oven to 275F. While it warms, line a baking sheet with aluminum foil. Rub the sweet potatoes with the 1 tablespoon olive oil, arrange on the lined baking sheet, and sprinkle each generously with salt and pepper. Place carefully into the oven and bake at 275F for 2½ hours.
  • While the sweet potatoes take their sweet time, make the ginger lime butter. In a small bowl, use a spoon or a spatula or a small whisk to whip together the softened butter, the lime zest, the ginger, and the brown sugar. Once fluffy and well combined, cover with plastic wrap and stow in the fridge until a few minutes before it’s time to eat.
  • When the sweet potatoes have about ½ hour left to bake, start on the broccoli. Combine the 3 tablespoons vegetable oil and 2 tablespoons sesame oil in a small bowl. Cut the broccoli into large, steak-like slices straight across the head – the point is to have lots of flat sides of broccoli flesh to lay against the pan.
  • Heat about 1 tablespoon of the oil mixture in a large skillet over high heat. When the oil is shimmering but not quite smoking, carefully arrange slices of broccoli over the surface in a single layer. Try not to crowd; you will likely need to do this in a few batches. Cook without moving until the underside of each broccoli slice is deeply bronzed, around 2-3 minutes depending on your stove. Flip each piece over and repeat, so both sides are darkly browned and the broccoli is barely tender. Remove to a bowl or serving dish and repeat, adding more of the oil mixture when needed, until all of the broccoli is cooked.
  • While you are cooking the batches of broccoli, whisk together the 1 tablespoon lime juice and 1 tablespoon fish sauce in a small bowl. When all of the broccoli is done, pour on the sauce mixture and toss to combine.
  • After 2½ hours, the sweet potatoes are done. For an extra layer of flavor and texture, if you wish, set them under your broiler on high for a few minutes just before serving, until the skin blackens and crackles just a little bit, then carefully remove to a plate, split down the center, add a heaping helping of the ginger lime butter, and serve with a side of the broccoli.

Parsley Pie Crust

Food Blog January 2013-0412

I’ve never been one to start at the beginning.  Stories require backing up and wait- wait- let me explain who that was.  Dreams are recalled near the end, and only slowly do the initial details return.  Directions often skip a step or come in fuddled order.  I don’t know whether this is a consequence of a disorganized brain, or whether it’s a signal of confused genius (hah!).  The Odyssey, with its in media res trope, was an enormity to my teenage brain when I first encountered it during high school.  What a wonderful way to present information, and how validating and revelatory it was to find out that this was a classical method!

So it was no big surprise that, when facing the first week of my dough challenge, I couldn’t start at the beginning.  Ruhlman arranges Ratio with doughs first, true, but he seems to traverse the category in a solids-to-liquids order.  Bread comes first, pate-a-choux closes the chapter.  To me, this was even more intimidating than the idea of tackling dough at all.  Bread is something I want to build toward, not race into headfirst.

I flipped ahead in the book to take on my own personal Waterloo: pie crust.  Supposedly “easy as.”  But I’ve never found it that way.  My crust is somehow tough AND crumbly.  It collapses, it sticks, it refuses to roll in a smooth circle, it requires patching and crimping and pressing and it’s just easier to buy Pillsbury.  But now I’m in it, and I’ve got to conquer this thing.

Despite this personal beginning, it wasn’t enough for me to just make a pie crust.  You guys have probably all made pie crust.  How boring would it be for me to just report on the quiche I made?  At the end of the pie crust section, Ruhlman lists a number of alternatives and additions.  Ground nuts, cracked peppercorns, a dusting of spices, parmesan cheese?  I had never considered this.  I had to try it out.

Our quiche would have a parsley crust.  Coincidentally, this made my experimentation a perfect candidate for submission to Weekend Herb Blogging.

(I started with parsley, and then I started imagining adding lemon zest, and big particles of cracked black pepper, and then I realized that I just wanted some of the herbed buttermilk biscuits I so heralded when I made them for my Bittman project.  Biscuits are in our future, friends.)

The ratio for pie dough – at least this one – is 3, 2, 1.  Three parts flour, two parts fat, one part water.  This is by weight.  The problem here is, despite my desire to conquer this beast, and despite the impressive (read: verging on ridiculous) collection of kitchen tools I’ve amassed over the years (pot sticker press, anyone?), I don’t have a kitchen scale.  That makes it hard to work in weights.

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Fortunately, though he advocates it persistently, Ruhlman provides the general weight range for a cup of flour, so I worked with that.

Every pie crust recipe I’ve ever read, Ruhlman’s ratio included, calls for the water to be ice cold.  I get this: you want the fat to remain cold during this construction phase so it can melt and leave flaky pockets as it bakes.  Ice water keeps things frosty.  I decided to skip the ice cube middle man and stuck my water in the freezer for a few minutes.

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Usual procedure here: cut in the butter, add salt (and parsley, in this case), incorporate just enough water to bring things together, form into a disk and refrigerate to firm the fat back up.  Then you can roll out, fill, and bake.

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Food Blog January 2013-0401

That all sounds pretty simple, but somewhere in there things tend to go wrong for me.  This crust was (relatively) easy to work with.  It didn’t disintegrate, it didn’t melt, it didn’t even crack in too many places.  I think playing with biscuit and cracker doughs this past year accustomed me to the feeling and delicacy required to not destroy a circle of dough.  It was barely moist and not exactly elastic, but it did have a bit of give.  It baked to a lovely golden color, the flecks of green were intriguing and special, and the quiche that rested just wobbling between its sturdy walls was delicious.

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But the crust was tough.

I can assume a few reasons for this.

1.) It’s possible my ratio was off.  Because I didn’t weigh my flour, I may have had too much or too little in the mix.

2.) More likely, I overworked the dough.  I pressed and kneaded and folded until the dry bits at the bottom of my mixing bowl were willing to play along, and perhaps I was too insistent about that demand for inclusion.

Food Blog January 2013-0408

Like everything else, it seems pie crust needs a revisit to get it right.  The feeling of the dough between my fingers is familiar, but I have to learn its textural intricacies.  How much water is just enough?  How crumbly can it be and still hold together?  How much of the dryness do the fat and water absorb while the wrapped disk rests?  Without another attempt or three, I won’t know.

But it tasted good.  It crunched against the quiche and while it didn’t shatter at the slightest fork pressure, it did have that dryness against the teeth you expect from crust.  The parsley contributed a grassy freshness and made the flavor more complex, especially the following day.  I could see this working similarly well with dill, or thyme, or maybe even marjoram, all of which pair nicely with broccoli and mushrooms.

Onward, then.

Food Blog January 2013-0417

Broccoli mushroom quiche with parsley pie crust

(The quiche recipe is my mom’s.  I’m sure she got it from somewhere, but I don’t know that she even knows where anymore.  I’ve changed very little here, though her version usually contains bacon instead of mushrooms)

Crust:

1 heaping, lightly fluffed cup of flour (or 6 oz., if you’re doing this properly)

1 stick (8 TB, 4 oz., etc) butter, cut into 16 or so pieces

2-4 oz. very cold water

Pinch salt

2 TB chopped parsley (or dill, or oregano, or marjoram, or thyme… whatever you like best, I expect)

Filling:

1 cup small broccoli florets

6-8 crimini mushrooms, sliced thinly

¼ cup green onions, diced

Olive oil

Salt and pepper to taste

4 eggs

1 cup milk

1 ½ cups grated extra sharp cheddar cheese

½ cup grated swiss cheese

First, make the pie crust.  Measure out your water and put it into the freezer while you assemble your other ingredients.

In a bowl, combine the flour and butter pieces.  With your hands or a pastry blender (I always use the pastry blender – I hate the too-dry feeling of slowly crusting flour on my hands), cut the butter into the flour until it is pea-sized chunks and smaller.  Add the salt and herbs and combine gently.

Dribble in some water – 2 oz. to start with – and combine.  If the dough really isn’t coming together, add more water.  When you can press a few teaspoons of the dough between your fingertips and it stays together, turn the whole mass out onto a floured board and work lightly to bring it together into a disk.

Wrap the disk in plastic wrap and stow it in the fridge for half an hour or so.

When the dough disk is cold and firm, bring it back to your floured board and remove the plastic wrap.  Roll it out, moving a rolling pin (or wine bottle) in a few strokes straight away from you and back toward you only.  Avoid diagonal movements.  The dough will become a long oval.  Then, flip the dough over and turn it 90 degrees so you are facing a fat, flour-drenched oval instead.  Roll again, still moving the rolling pin straight away from and back toward you.  Repeat this process until you have a rough circle an inch or two larger than the diameter of your pie plate.

Lightly roll half of the dough around your rolling pin and drape it loosely into the pie plate, unrolling as you go, letting the crust settle into the dish.  Trim, crimp, or fold over any dangling edges as aesthetically as you are able.

Set aside (or perhaps return to the refrigerator?) while you make the filling.

Preheat the oven to 350F.

Heat some olive oil in a skillet over medium-high heat.  When it is shimmering, add the mushrooms and give them a good stir, taking care that as many as possible have contact with the bottom of the pan (that is, don’t leave them piled atop one another if you can help it).  Then leave them alone for a good five minutes, or until they begin to develop a golden crust.

While the mushrooms are getting golden, steam or microwave the broccoli florets until they are just crisp-tender and still very bright green.  Set them aside.

Turn your mushrooms and let them sizzle for another five minutes or so.  When they are golden on both sides, turn the heat down to medium and add the onions.  Cook until soft and translucent.  Toss the broccoli in the pan, then add salt and pepper to taste.  Mom often adds tarragon or marjoram at this point as well – start with ½ tsp and see what you like.  Remove from heat and set aside to cool for a few minutes.

While the vegetables cool, beat the eggs and milk together.  Add a dash of grated nutmeg, if you like, or some cracked black pepper.  As the quiche bakes, this will become a lovely firm custard.

To assemble, fill the pie crust with the vegetables, spreading them in an even layer.  Gently pour the custard over the vegetables.  Toss the shreds of cheese together and spread them evenly across the top of the filling.

Bake for 50-60 minutes, or until the cheese is golden and the quiche has puffed in the middle.  If it’s not puffed yet, it’s not done.  The ingredients will be cooked through, but when you cut into it you will find a disappointing watery layer at the bottom.  Give it another few minutes.

With the center puffed and the cheese sizzling, remove the quiche from the oven and let it sit for 5-10 minutes so the cheese can solidify a bit and doesn’t string all over when you try to cut through it.

Slice and serve. Food Blog January 2013-0418