Louis’ Lunch - Connecticut

Louis’ Lunch

As the story goes, in 1900 a man requested that the luncheonette’s owner make him something to eat on the go—the result was a broiled beef patty in between two slices of bread. Voilà! America’s first hamburger. Louis’ still serves them the same way, and don’t even think about ketchup—condiments are forbidden.

http://www.louislunch.com/

only options to go on the burger are:
cheese, tomato, and onion