Burger Burger is a unique, historic little place in downtown Biloxi you must visit! Their burgers are cooked in a mustard based sauce that's fantastic and are best served on a po boy roll with onions. Order a half with double meat unless you have a BIG appetite or plan to share. Goes great with a side of fried green tomatoes (fantastic) or sweet potato fries. Be sure to take a little time to chat with the owners!