Prepare all ingredients by slicing the ribeye, cutting the bell peppers into strips, slicing the onion, and chopping the mushrooms.
For the Cheesesteak:
In a large skillet over high heat, warm the oil. Add in the onions, peppers, and mushrooms, cooking until they are a golden brown. Set the vegetables aside once done.
Add the sliced beef to the same skillet. Season with salt and pepper and cook until the beef is browned and tender. Stir in the cooked vegetables.
Place the provolone cheese over the beef and vegetable mixture. Allow it to melt for about a minute in the skillet.
Stuff the hoagie rolls with the cheesy beef and vegetable filling. Serve immediately and relish the authentic Philly taste!