1 1/2 lb. hamburger
1 med. onion
Small bag of noodles
1 can tomatoes
1 can mushroom soup
Lots of cheese

Fry hamburger and onions together. Cook noodles; drain. Combine all ingredients, except cheese, in casserole dish. Bake at 350 degrees until bubbly. Add cheese. Cover and bake until cheese melts.