Ingredients

8 tablespoons (1 stick) unsalted butter, plus more for casserole
6 slices White bread, crusts removed, torn into 1/4- to l/2-inch pieces
5 1/2 cups Milk
1/2 cup All-purpose flour
2 teaspoons Coarse salt, plus more for water
1/4 teaspoon Ground nutmeg
1/4 teaspoon Freshly ground black pepper
1/4 teaspoon Cayenne pepper
4 1/2 cups (about 18 ounces) grated sharp white cheddar cheese
2 cups (about 8 ounces) grated Gruyère or 1 1/4 cups (about 5 ounces) grated Pecorino Romano cheese
1 pound Elbow macaroni

Description

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