Baked Ziti With Four Cheeses

1/4 cup butter 1/4 cup all-purpose flour 3 cups milk , scalded 1/4 teaspoon nutmeg 1 teaspoon salt 1/2 teaspoon pepper 1 1/2 cups grated gruyere cheese 2 cups[...]

1 lb ziti pasta 3/4 lb whole milk ricotta cheese 1/4 lb italian fontina , coarsely grated 1/4 lb whole milk mozzarella , coarsely grated 1/4 cup finely grated[...]