"This luxurious macaroni and cheese keeps unbaked in the refrigerator for up to a day; in the oven, it turns piping hot and creamy inside, and golden brown on top in less than an hour. Substitute your favorite melting cheeses (mozzarella, Monterey Jack, and fontina are great options), or vary the proportions of the ones listed here...."
INGREDIENTS
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6 tablespoons unsalted butter, plus more for baking dish
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Coarse salt and ground pepper
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1 pound medium pasta shells
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1/4 cup all-purpose flour
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1 teaspoon dry mustard powder
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4 cups whole milk
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4 ounces sharp white cheddar cheese, coarsely grated (1 cup)
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4 ounces Havarti cheese, coarsely grated (1 cup)
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4 ounces Muenster cheese, coarsely grated (1 cup)
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1 teaspoon Worcestershire sauce
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6 slices white sandwich bread