During the American Liquor Prohibition period, Southern California elites would go to Tijuana for a drink. It was in this time period that X opened a restaurant in Tijuana.
According to an urban legend, on July 4th, 1924 the restaurant received too many guests & X threw together whatever leftovers he had. The dish was originally supposed to be a finger food, but has become an emperor of a dish.
What am I talking about?