Patty Melts
["1 lb. ground beef", "3 slices cheese", "6 slices rye bread", "1 onion, sliced and grilled"]
["Fry ground beef, made into 3 patties.", "Butter each slice of bread on one side.", "Place hamburger patty, cheese and onions between 2 slices of bread and grill until golden brown on each side."]
["ground beef", "cheese", "rye bread", "onion"]