The burgers are cooked vertically in the original cast iron grills dating back to 1898.
They are cooked to order and served on two slices of toast. The only extras served are cheese, tomato & onion. I opted to have only cheese which is a spreadable kind.
At first I was skeptical as to how good a burger could be served on plain toast, without ketchup. I was pleasantly surprised as to how great it was. The cheese spread added lots of flavor and the burger itself was really juicy!
More info on Louis’ Lunch at here.