If you didn't already know it, before there was provolone, a Philly Cheesesteak actually had Cheese Whiz on top! It's still a little bit of an argument as to who came up with putting Cheese Whiz on top of the steak sandwich, since both Pat Olivieri and his rival, Joe Vento, claim that they came up with the idea. I don't know about you, but I'm team provolone all the way!