1 lb. ground beef, browned
1 sm. onion
1/2 green pepper
1 can mushrooms
1 can tomato paste
1 can stewed tomatoes
1 pkg. stewed tomatoes
1 pkg. Mozzarella cheese

Slice zucchini thin, place in pan and add ingredients. Bake 1 hour at 350 degrees, covered. Sprinkle Parmesan cheese on top before serving.