Cheesesteaks have clear ties to Philadelphia, where hot dog vendors Pat and Harry Olivieri were scarfing down links every night before switching things up for dinner one night. Their grilled steak and onion sandwich caught on with cabbies and Harry’s son Frank later added molten Cheez Whiz to the mix. Over the years, Provolone or American cheese have also become popular, as have peppers. Now, the Philly original serves as a touchstone across cultures. From traditional to otherworldly, learn about some of the best cheesesteaks in L.A.