Philadelphia is known as the City of Brotherly Love, and serious lunch-love is what we feel when we partake of Pennsylvania’s official state sandwich, the Philly Cheesesteak. This pinnacle of cheesiness has actually been around since 1930 when Pat Olivieri created the sandwich at his hot dog stand in South Philly. If you’re from the Philadelphia area, you know that folks claim their allegiance to a particular cheesesteak joint with a feverish fervor. But you can easily make this delectable creation at home. The trick is slicing the beef super thin, which you can do if you freeze the meat ahead of time.