Hamburger And Bean Casserole
["1 large onion, chopped", "1 lb. hamburger", "1 can pork and beans", "1 can tomatoes", "1 tsp. salt"]
["Brown meat and onion.", "Mix in pork and beans, tomatoes and salt.", "Pour into greased casserole and bake about 1 hour in moderate oven.", "May be topped with sliced bacon before baking."]
["onion", "hamburger", "pork", "tomatoes", "salt"]