2 lbs. ground round
2 lg. tomatoes
1 lg. onion
2 lg. zucchini
18 slice pkg. Swiss cheese
18 slice pkg. American cheese

Brown ground round in large skillet (seasoning is optional). In casserole place a layer of ground round, a layer of sliced zucchini, a layer of sliced tomatoes, a layer of Swiss cheese, a layer of zucchini, a layer of sliced onions, a layer of American cheese and top it off with the remainder of the ground round. Bake at 350 degrees for 45 minutes.