1 onion, chopped
1 1/2 lb. hamburger
1 can tomato soup
1 lb. can cooked green beans
1 can mushrooms (optional)
4 - 6 potatoes, cooked (I use leftover mashed potatoes)
1/2 c. warm milk
Salt and pepper
1 tbsp. butter
6 oz. shredded cheddar cheese

Brown onion with hamburger in skillet; drain grease. Add tomato soup, mushrooms and green beans; pour into 2 quart casserole. Mash potatoes; add milk, butter, salt and pepper. Spoon over meat mixture. Add cheddar cheese to top. Bake 30 minutes at 350 degrees.