Barbecue Hamburgers, Arkansas Style
["1 lb. hamburger", "1 large onion, grated", "2 tsp. mustard", "1/2 c. barbecue sauce", "1 tsp. horseradish (optional)", "salt and pepper to taste"]
["Mix and let stand 1/2 hour.", "Spread on buns without packing, covering edges of buns well.", "Broil until done."]
["hamburger", "onion", "mustard", "barbecue sauce", "horseradish", "salt"]