Sci-fi dine in theatre, Disney studios. Serves 1 1/8 cup margarine 1/8 cup flour 1/2 cup milk 1/2 pound orange American cheese 1 tsp yellow mustard salt pepper 3 cups rotini pasta (or shells) 1/4 cup cheddar cheese, grated. In a small pan, melt margarine and add flour. Cook for 5-7 minutes. Do not brown. Heat milk separatley and whisk into the roux. Simmer for approximately 10 minutes until mixture thickens. Add American cheese and mustard. Blend well and season to taste with salt and pepper. Do not boil sauce once cheese has been added or sauce may break. Cook pasta according to package directions. Drain well and rince under cold water. Drain well again and mix with sauce. Place in an oven-proof baking dish and sprinkle top with grated cheese. Broil (grill) until cheese melts and top is lightly browned.