Select SEAR/SAUTE and set to MD:HI. Select START/STOP to begin. Allow to preheat for 5 minutes.
Place oil, onion, and green pepper into the pot. Cook until vegetables are soft, approximately 5 minutes. Add salt and mushrooms, and cook until mushrooms are soft and have released most of their liquid, approximately 5 minutes.
Add shaved steak, garlic powder, onion powder, black pepper, and Worcestershire sauce. Stir, and cook until steak is cooked through, approximately 5 minutes.
Fold in the cubed sub rolls, allowing them to soak up the juices from the steak. Evenly lay the Provolone slices on top of the mixture.
Close the crisping lid. Select BAKE/ROAST, set temperature to 375 degrees F, and set time to 7-10 minutes. Select START/STOP to begin. Check frequently to avoid burning the cheese.
When cheese is browned and bubbly, serve immediately.