1 lb. hamburger, browned with 1 tbsp. instant onion, drain
1/4 to 1/2 c. catsup with equal amount of water
1/3 pkg. spaghetti, cooked and rained
2 to 3 tbsp. Parmesan cheese
Cheese

Mix hamburger, catsup, water and spaghetti together along with Parmesan cheese. Pour in casserole dish. Top with slices of cheese. Bake uncovered at 350 degrees for 1/2 hour.