Place onion in 1-1/2 quart casserole. Cover with plastic wrap or glass lid. Cook in microwave oven, covered, on FULL POWER for 2 to 3 minutes, or until onion is tender. Add remaining ingredients. Season with salt and pepper, as desired. Set aside. Combine all ingredients for meat balls. Make meat balls about 1 inch in diameter. Place in a 1-1/2 quart casserole dish. Cover with plastic wrap. Cook in microwave, covered, on FULL POWER for 5 to 6 minutes, or until meat is not longer pink. Turn meat balls over halfway through cooking time. Drain. Pour tomato sauce over meat balls. Cook, covered, on FULL POWER, for 4 to 5 minutes, or until heated through. Serve over cooked spaghetti. Calories: Approximately 290 per serving. Yield: 5 servings. LOW CALORIE GLORIA ALLEN (MRS. CHARLES A.) From , by the Little Rock (AR) Junior League. Downloaded from G Internet, G Internet.