1 lb. hamburger
1 med. onion, diced
1 med. zucchini, sliced
2 ripe tomatoes, sliced
1 pkg. mild Cheddar cheese, shredded

Cook hamburger and onion; drain. In casserole dish make a layer of zucchini, a layer of hamburger, a layer of tomatoes. Top with cheese. Bake at 350 degrees until golden brown.