Creating Philly Cheesesteak Pizza is straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 425°F (220°C).
2. Cook the Beef: In a large skillet, heat olive oil over medium-high heat. Add the sliced beef and season with garlic powder, onion powder, salt, and black pepper. Cook until browned, about 4-5 minutes.
3. Add Vegetables: Add the sliced onion and green bell pepper to the skillet. Sauté for an additional 3-4 minutes until the vegetables are tender.
4. Prepare the Crust: If using a store-bought crust, follow the package instructions for pre-baking. If using homemade dough, roll it out to your desired thickness and place it on a pizza stone or baking sheet.
5. Spread the Sauce: If desired, spread a thin layer of mayonnaise over the pizza crust for extra creaminess.
6. Layer the Beef Mixture: Evenly distribute the cooked beef and vegetable mixture over the pizza crust.
7. Add Cheese: Sprinkle the provolone and mozzarella cheese generously over the top of the beef mixture.
8. Bake: Place the pizza in the preheated oven and bake for 15-20 minutes, or until the cheese is bubbly and the crust is golden brown.
9. Cool: Once baked, remove the pizza from the oven and let it cool for about 10 minutes.
10. Garnish: Before serving, sprinkle chopped fresh parsley on top for a burst of color and flavor.

These steps will guide you in creating this incredible pizza effortlessly.