1 med. onion, chopped
1 lb. ground beef
Salt
Pepper
2 1/2 c. green beans
1 can tomato soup
5 med. potatoes, cooked
1/2 c. warm milk
1 egg, beaten

Brown hamburger and onion; drain well. Add drained beans and soup; pour into greased, 1 1/2-quart casserole. Mash potatoes with milk, egg and seasonings. Spoon over meat. Bake at 350 degrees for 30 minutes.