Put the meat and onions in a 1 1/2 qt. Covered casserole. Cover and cook until all redness is gone from the meat, 5-7 minutes breaking up the meat and stirring twice. Drain fat from cooked meat. Drain excess liquid from the spinach and set aside to add to sauce.

Mix the meat, spinach, and remaining ingredients. Stuff gently into the cooked and drained manicotti. Place the manicotti in a single layer in a 2 qt. (12"x9") rectangular casserole. Cover with the sauce. Cover loosely with waxed paper and cook 10 minutesin the microwave oven on high power. Let stand 5 minutes. Sprinkle top with more parmesan cheese of desired.

***Sauce: Mix all ingredients and cook, covered, in a 2-quart casserole in the microwave oven fore 20 minutes, stirring occasionally.