MICROWAVABLE: Due to differences in microwave oven designs, cooking time may vary slightly. Place frozen rigatoni in a microwave safe container covered with your favorite sauce. Cover and microwave on HIGH for approximately 5 minutes, stirring once halfway through.
STOVETOP: Add frozen rigatoni to rapidly boiling salted water. Stir gently. When second boil occurs and rigatoni rise to surface, slow boil uncovered for 1 to 2 minutes to desired tenderness. DO NOT OVERCOOK. Strain and serve with your favorite sauce.
SAUTE: Heat your favorite sauce in a medium to large sized skillet. Add frozen rigatoni and toss gently but frequently over high heat for approximately 5 minutes. Garnish with grated cheese and serve.