Prepare Mostacciolias package directs. Preheat oven to 350°. In large saucepan, melt margarine; stir in flour, salt and pepper. Gradually stir in milk. Cook and stir until thickened. Remove from heat. Add 1 cup cheddar cheese; stir until melted. Stir in Mostaccioli. Spoon half of Mostaccioli mixture into greased 2-quart baking dish; top with Swiss cheese, remaining Mostaccioli mixture then remaining cheddar cheese. Bake uncovered 20 to 25 minutes or until bubbly. Refrigerate leftovers.

1/2(12-ounce) package Mostaccioli, uncooked
1/4 cup margarine or butter
1/4 cup unsifted flour
1/2 teaspoon salt
1/4 teaspoon pepper
3 cups milk
1 1/2 cups (6 ounces) shredded sharp cheddar cheese
1 cup (4 ounces) shredded Swiss cheese