The Hula Burger was a meatless burger introduced in the 1960's by Ray Kroc to McDonald's. It was a substitute for American Catholics that would not eat meat on Fridays. The burger was a slice of grilled pineapple with cheese on a bun. But this was designed to go up against the Filet-O-Fish, which was created by a Catholic McDonald's Franchisee Louis M. "Lou" Groen. (Lou Groen) McDonald's discontinued the Hula Burger early on, as it became quickly evident that its alternative, the Filet-O-Fish, was getting much better traction.