Philly Cheesesteaks

Super easy. 30 - minute (if that) meal that can be made for the "diet" people out there. Use olive oil in place of butter, low-fat or fat-free cheese and wheat hoagie buns.

1 lb. steak (you really can use any cut; since you're going to cut it up and season it heavily, there's really no need to splurge on a fillet mignon.)
2 Tbsp. butter
1 green bell pepper
1 medium yellow onion
Mushrooms (optional)
White cheese (mozzarella or Swiss or provolone)
Kosher salt and freshly-ground black pepper
4-6 Hoagie rolls

Slice bell peppers and onions. Set aside. Slice frozen meat. Set aside. Heat 2 Tbsp. butter over medium-high heat in a large skillet. Add steak and stir-fry. Season heavily with salt and lots of freshly-ground pepper. When meat is about half-cooked, add peppers and onions. Stir occasionally, cooking until most of the liquid is evaporated and meat is cooked through.

Slice buns and spoon steak mixture inside. Top with cheese and place under broiler for 1-2 minutes or until cheese is melted and bread is slightly toasty. Enjoy!