Favorite Casserole - cooking recipe

Ingredients

1 lb. hamburger
1 can cream of mushroom soup
4 c. mashed potatoes
salt
1 onion, chopped
2 cans green beans
1 egg
pepper

Preparation

In a 9 x 13-inch pan, layer hamburger, onion, green beans and soup in this order.
Salt and pepper to season.
Whip egg and mashed potatoes together.
Spread over soup.
Sprinkle with pepper.
Bake at 350\u00b0 for 45 minutes.