Macaroni and Cheese* 1 1/2 cups macaroni -- * see note 1/4 cup butter or margarine 1 small onion -- chopped 1/2 teaspoon salt 1/4 teaspoon pepper 1/4 cup all-purpose flour 1 3/4 cups milk 8 ounces MontereyJack cheese cut into 1/2" cubes Cook macaroni as directed. Cook and stir margarine, onion, salt and pepper over medium heat until onion is slightly tender. Blend in flour. Cook over low heat, stirring constantly, until mixture is smooth and bubbly; remover from heat. Stir in milk. Heat to boiling, stirring constantly. Boil and stir 1 minute; remove from heat. Stir in cheese until melted. Place macaroni in ungreased 1 1/2-quart casserole. Stir cheese sauce into macaroni. Cook uncovered in 375 F oven 30 minutes. NOTES : *Use elbow macaroni, rigatoni, or spinach egg noodles.