I have finally gone to taste the burger at Louis' Lunch in New Haven, CT. Louis' Lunch claim to be the birthplace of the hamburger. It is a unique burger for sure. They place juicy meat on toast with tomato, onion, and little bit mayo. They give you to option to add cheese wiz, but NO ketchup is allowed. It was a medium sized burger although I had imagined it as being cumbersome and sloppy.. I didn't get their potato salad, although it looked pretty tasty as well.