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Sweet-Potato-and-Apple Gratin
Dan Barber Blue
Hill
Serves 8
7 tablespoons butter
11⁄2 pounds Granny Smith apples, peeled, cored, quartered,
and sliced
1⁄4-inch thick
1⁄2 cup heavy cream
1⁄2 cup whole milk
2 teaspoons salt
1 teaspoon white pepper
1⁄2 teaspoon cinnamon
Big pinch ground nutmeg
21⁄2 pounds sweet potatoes, peeled, cut into 1⁄4-inch-thick
rounds
1 clove garlic, crushed
1⁄2 cup panko or fresh bread crumbs
Preheat oven to 350 degrees.
In a 12-inch nonstick pan, lightly brown 4 tablespoons of
butter over medium heat. Add the apples, and sauté in
batches until just colored, making sure they stay firm. Set
the apples aside on a plate. In a large bowl, stir the cream,
milk, salt, pepper, cinnamon, and nutmeg until the salt has
dissolved. Toss the potatoes in the cream to coat.
Generously butter an 8-by-8-by-2-inch ovenproof dish, and
rub with the crushed garlic. Line the bottom of the dish with
a layer of overlapping potatoes, followed by overlapping apples.
Repeat, finishing with a layer of potatoes. Pour in remaining
spice-cream mixture.
Cover with aluminum foil, and bake for about 11⁄2 hours,
or until the potatoes are cooked. Heat the broiler. Sprinkle
panko over the gratin, dot with 1⁄2-inch cubes of the
remaining butter, and broil until the bread crumbs are golden
brown.
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