Ingredients :

• Ribeye — The cut not to be replaced by a standard steak. Ribeye has enough marbling to stay juicy after quick cooking — stewing beef or ground beef will dry out. Ask your butcher to slice it very thin (2-3 mm), or put the piece in the freezer for 30 minutes before cutting it yourself: it slices cleanly with a knife.
• Provolone — The historic cheese of the original Philly cheesesteak. It melts well without being as sharp as cheddar, and it keeps a slight hold when cut. In supermarkets, you find it in thin slices at the deli counter. Can’t find it? Low-moisture mozzarella works very well; the taste is more neutral but the melt is impeccable.
• Egg roll wrappers — Refrigerated section in Asian groceries, about 20 cm square. Do not confuse with spring roll pastry or phyllo — after frying, the texture is completely different: thicker, crunchier, it holds the filling. Keep them covered with a damp cloth while rolling; they dry out and break in less than a minute in the open air.
• Yellow onion + bell peppers — One red, one green — the red brings sweet softness, the green a slight bitterness that balances the richness of the steak. Cut everything into fine julienne: pieces that are too thick create bumps in the roll and weaken the dough when folding. The onion must really melt and caramelize, not just become translucent.