1 lg. jar spaghetti sauce
8 oz. pkg. mozzarella cheese, shredded
1 lb. ziti
1 lb. hamburger

Heat spaghetti sauce in pan. Add mozzarella to sauce until melted. Reserve enough cheese to sprinkle over top of casserole. Cook hamburger in frying pan. Cook ziti according to package mix; add cooked ziti in pan of sauce and cheese. Pour into baking dish with hamburger.

Sprinkle remaining cheese on top.

Cook at 350 degrees until cheese is melted.