In 2-quart casserole, combine onion, margarine, garlic and pepper.
Microwave at High for 5 to 6 minutes, or until onion is tender, stirring once.
Add remaining ingredients, except cheese.
Microwave at High for 7 to 10 minutes, or until tomato is tender.
Let stand, covered, for 5 minutes.
Sprinkle each serving with Parmesan cheese.