Leaf lettuce, tomato slices and onion slices, optional
In a small bowl, combine the egg, cheese, onion, soy sauce, ketchup and pepper. Crumble beef over mixture and mix well. Shape into five patties. Wrap a bacon strip around each; secure with a toothpick.
Grill patties, uncovered, over medium-hot heat for 5-6 minutes on each side or until a thermometer reads 160° and juices run clear. Discard toothpicks. Serve on buns with lettuce, tomato and onion if desired.