Coney Island Hamburgers
["3 lb. hamburger", "2 lb. sliced onion", "1 bottle ketchup", "1/2 bottle water"]
["Make hamburger patties, fry slightly on both sides, then fry onions lightly.", "In a roasting pan, layer patties and onions. Pour bottle of ketchup mixed with water on top of patties and onions.", "Bake at 350\u00b0 for 1 hour."]
["hamburger", "onion", "ketchup", "water"]