INGREDIENTS
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1/2 cup water
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1/2 cup milk
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1 stick (4 ounces) unsalted butter, cut into tablespoons
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Large pinch of coarse salt
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1 cup all-purpose flour
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4 large eggs
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3 1/2 ounces shredded Gruyère cheese (1 cup), plus more for sprinkling
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Freshly ground pepper
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Freshly grated nutmeg