Ingredients
Serves 10 to 12
- 6 tablespoons unsalted butter, plus more for dish
- 1 medium onion, finely chopped
- 1/2 cup all-purpose flour
- 5 1/2 cups whole milk
- 2 teaspoons coarse salt
- 1/4 teaspoon freshly ground black pepper
- 1 pinch of cayenne pepper
- 1 1/2 cups grated (about 4 1/2 ounces) Parmesan cheese
- 1 1/2 cups grated (about 6 ounces) Gruyere cheese
- 1 1/2 cups grated (about 6 ounces) Fontina cheese
- 1 1/2 cups (about 6 ounces) Gorgonzola cheese, broken into small pieces
- 1 pound ziti or mostaccioli pasta, uncooked
- 1/2 pound thinly sliced prosciutto
Description
Martha Stewart
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