Which technically is not a burger in the sense you would think of a burger. It is on a burger style roll so hence the name. It is actually made with a creamy cheese spread, caraway bacon sauerkraut, and fried onions.
Tomato and mayo on white
BLT and mayo on white
Mortadella or Sopressata Salami on Italian
Bacon on white
Peanut butter and bacon on whole wheat
Chopped ham and pickle w/ mayo on rye
Roast beef w/ horseradish mayo on anything