INGREDIENTS
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Kosher salt
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Vegetable oil
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1 pound elbow macaroni
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1 quart whole milk
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1 stick (4 ounces) unsalted butter, divided
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1/2 cup all-purpose flour
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12 ounces Gruyere cheese, grated (4 cups)
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8 ounces extra-sharp Cheddar, grated (2 cups)
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1/2 teaspoon freshly ground black pepper
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1/2 teaspoon nutmeg
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1 1/2 pounds cooked lobster meat
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1 1/2 cups fresh white bread crumbs (5 slices, crusts removed)