Enjoy this tasty burger that comes with not one but two classic sauces to give it extra flavor. This is perfect for your next barbecue or casual meal. Ingredients: 1 lb ground beef 4 burger buns 1/2 cup mayonnaise 1/4 cup ketchup 1/4 cup mustard 4 slices cheddar cheese 4 lettuce leaves 4 tomato slices 4 red onion slices Salt and pepper to taste Instructions: Warm the grill up to a medium-high level Shape the ground beef into 4 burger patties that are all the same size Add pepper and salt For medium-rare, put the burger patties on the grill and cook for about 4 to 5 minutes on each side You can change the cooking time to suit your taste Add a slice of cheddar cheese to each patty in the last minute of cooking Mix the mayonnaise, ketchup, and mustard together to make the sauce while the burgers are cooking Put the burger buns on the grill and toast them...