Making Delicious Philly Cheesesteak Pizza is easy when you follow these simple steps:

1. Preheat Oven: Preheat your oven to 450°F (232°C). This ensures a crispy crust.

2. Cook the Steak: In a skillet, heat olive oil over medium-high heat. Add the thinly sliced ribeye steak. Season with salt, pepper, and garlic powder. Cook for about 3-4 minutes until browned, then remove from heat.

3. Sauté Vegetables: In the same skillet, add the sliced onion, green bell pepper, and red bell pepper. If using mushrooms, add them as well. Sauté for about 5 minutes until they are soft and slightly caramelized.

4. Prepare Pizza Crust: Roll out your pizza crust on a floured surface if using homemade dough. Transfer to a pizza stone or baking sheet lined with parchment paper.

5. Assemble the Pizza: Spread the cooked steak evenly over the pizza crust. Top with sautéed vegetables.

6. Add Cheese: Sprinkle shredded provolone cheese and mozzarella cheese generously over the top of the steak and vegetables.

7. Bake: Place the pizza in the preheated oven and bake for 12-15 minutes, or until the cheese is bubbly and the crust is golden brown.

8. Garnish: Once out of the oven, let the pizza cool for a couple of minutes. Garnish with fresh parsley if desired.

9. Slice and Serve: Use a sharp pizza cutter to slice the pizza into wedges.

These steps will guide you in making an incredible pizza that combines the best of both worlds: cheesesteak and pizza!