GENIUS for kids parties! Easy Cheeseburger Sliders: Combine 2 lbs beef, with 1/4 cup bread crumbs, 3/4 cup onion, and salt to taste. Press mixture into a 9 x 13 in pan so that it makes one large patty of even thickness. Bake at 400 for 30 mins. Top with cheese and put back in oven just until cheese melts. Assemble as shown!