Preheat oven to 350 degrees
Place flank steak on a baking sheet, and season with salt and pepper.
Pour olive oil and Worcestershire Sauce over the top, and rub in.
In a bowl combine peppers and onions and mushrooms, and add olive oil, Worcestershire, and salt and pepper, stir to combine.
Dump around the outside of the flank steak, over the tray.
Bake 15 minutes
Broil 3-5 minutes
Take flank steak off tray, and slice into very thin slices, and bite sized pieces. Add back to the tray
Cover the meat and veggies with the provolone cheese
Bake with cheese 5-7 additional minutes at 350 degrees
Stir well to combine cheese with veggies and meat
Load up hoagies, season with additional salt and pepper if desired