Broil for 5 minutes. Turn over, brush with oil and broil for another 5 minutes. Meanwhile, brown ground round in skillet until no longer pink. Pour off drippings. Add chopped onions, salt and pepper and cook for 5 minutes.
Slice tomatoes into -inch disks.
Place half of sliced tomatoes in baking dish. Place eggplant on top of tomatoes. Sprinkle beef mixture on top and cover with rest of tomatoes. Cover with aluminum foil and bake for 15 minutes at 500 degrees F. Serve over a bed of rice. Makes 4 servings.