The Earl of Sandwich.
He needed to eat fast and simple so he could get back to gambling.
Ray Croc and White Castle are both Johnie-Come-Latelies(by a couple centuries).
It was the cook for the mythical Earl, hot dogs and hamburger stands have existed since the 19th century.
The term "fast food" was recognized in a dictionary by Merriam-Webster in 1951.
Arguably the first fast food restaurants originated in the United States of America with the White Castle (restaurant) in 1916
Fast food was not invented, it evolved out of necessity due to life style changes.