(Shaved rib eye). These two items are absolutely crucial. Any decent provi cheese or whiz if you like that will work. Black skillet heated real hot with just a leetle canola oil. Cheese has to be melted on top of the steak which will cook real fast. I don’t heat my rolls. Some do. Fucks up the perfect chewiness in my view. Fry up yer onions in a separate small pan. Right onto the roll from the spatula and into your mouth. I only use salt and peeper to season. Serve with sauce or ketchup.