It's hard to think of Philadelphia without thinking of the cheesesteak, a sandwich containing chopped steak, melted cheese and sometimes peppers and onions. The big cheese steak debate, ongoing between rival restaurants Pat's and Geno's, is whether the steak should be topped with Provolone or American cheese, or canned cheese whiz. Bobby Flay's loaded cheese steak recipe is topped with a melted Provolone sauce, onions, peppers and mushrooms.
For perfectly thin steak slices, freezing the strip loin for 30-45 minutes is crucial. Ensure your griddle or grill pan is screaming hot before adding the steak for a quick sear, preventing overcooking and maintaining tenderness. When preparing the Provolone sauce, heat the milk gently and whisk in the cheeses gradually to achieve a smooth, lump-free consistency; avoid high heat to prevent the sauce from breaking. Caramelizing onions takes time and patience; cook them slowly over medium-low heat until deeply golden for optimal sweetness. Consider lightly toasting the hoagie rolls before assembly to add texture and prevent them from becoming soggy. For the ultimate flavor balance, prepare all components (sauce, mushrooms, onions, peppers) in advance and assemble just before serving.