Hamburger Pie
["1 medium onion, chopped", "1 lb. ground beef", "salt and pepper", "1 can (2 1/2 c.) green beans", "1 can tomato soup", "5 medium potatoes, cooked", "1/2 c. warm milk", "1 beaten egg"]
["Cook onion in hot fat; add meat and seasonings until brown. Pour into 1 1/2-quart casserole, drained beans and soup.", "Mash the potatoes; add milk, egg and seasonings.", "Layer beans, layer soup, then layer mashed potatoes.", "Meat goes on top.", "Bake at 350\u00b0 for 30 minutes.", "Makes 6 servings."]
["onion", "ground beef", "salt", "green beans", "tomato soup", "potatoes", "warm milk", "egg"]