Creating the amazing Ground Beef Philly Cheesesteaks involves straightforward steps that will guide you through the process:

1. Heat the Pan: In a large skillet, add a drizzle of olive oil and heat over medium-high.
2. Cook Vegetables: Add the sliced onions and bell peppers. Sauté for about 3-5 minutes until they are tender. If using, add mushrooms and cook for an additional 3 minutes.
3. Brown the Beef: Push the vegetables to the side of the skillet and add the ground beef to the pan. Break apart and cook until no longer pink, about 5-7 minutes.
4. Season: Stir in garlic powder, Worcestershire sauce, salt, and pepper. Mix everything together properly for about 2 minutes.
5. Melt the Cheese: Reduce the heat to low. Place a slice of cheese over the beef mixture. Cover the skillet with a lid and allow the cheese to melt, about 2-3 minutes.
6. Prepare the Rolls: While the cheese is melting, slice the hoagie rolls lengthwise without cutting all the way through.
7. Assemble the Sandwiches: Once the cheese has melted, spoon the beef and vegetable mixture into each roll.
8. Serve Hot: Optionally, toast the rolls for added texture before serving.

These steps are designed to help you create the ultimate Ground Beef Philly Cheesesteaks filled with rich flavors and satisfying textures.