Heat the Pan: Drizzle a tablespoon of olive oil in a large skillet over medium-high heat until shimmering.

Sauté the Vegetables: Add thinly sliced onions and green bell peppers, sauté for 3-5 minutes until tender. If using, add mushrooms and cook for 3 more minutes.

Brown the Ground Beef: Push vegetables aside, add ground beef, breaking apart with a spatula, and cook for 5-7 minutes until browned.

Season the Mixture: Sprinkle garlic powder, Worcestershire sauce, salt, and black pepper over beef, stirring for 2 minutes.

Melt the Cheese: Reduce heat to low, lay slices of provolone cheese over the mixture, cover and let melt for 2-3 minutes.

Prepare the Hoagie Rolls: Slice hoagie rolls lengthwise without cutting through, creating a pocket.

Assemble the Cheesesteaks: Fill each hoagie roll generously with the beef and vegetable mixture.

Serve and Enjoy: Optionally toast filled rolls in a hot pan or oven and serve hot with fries or salad.