1 1/2 lbs. hamburger
1 lg. onion, diced fine
1 lg. jar spaghetti sauce (any kind)
Sliced Swiss cheese
Cooked spaghetti

Cook spaghetti (break spaghetti into sm. pieces). Meanwhile, brown hamburger and onion; drain off any grease. In roaster, combine hamburger, spaghetti, and sauce; mix together. Cover roaster and bake in a 350 degree oven for about 30 minutes. Place cheese slices on top and bake until cheese is melted.