Creating this One-Pot Philly Cheesesteak Soup is straightforward. Follow these steps for a delicious result:

1. Heat Oil: In a large pot, heat olive oil over medium heat.
2. Cook Beef: Add the thinly sliced beef sirloin to the pot. Cook until browned, about 5-7 minutes.
3. Sauté Vegetables: Add the diced onion, green bell pepper, and red bell pepper. Sauté until the vegetables are tender, about 4-5 minutes.
4. Add Garlic: Stir in the minced garlic and cook for an additional minute until fragrant.
5. Pour Broth: Add beef broth to the pot and bring to a simmer.
6. Season: Stir in Worcestershire sauce, onion powder, garlic powder, and season with salt and pepper.
7. Add Cream: Reduce heat to low and stir in the heavy cream. Allow the soup to heat through for about 5 minutes.
8. Melt Cheese: Gradually add the shredded provolone cheese, stirring until melted and fully incorporated.
9. Taste and Adjust: Taste the soup and adjust seasonings as desired.
10. Serve: Ladle the soup into bowls, and garnish with fresh parsley, if desired.

These straightforward steps will guide you in preparing a delightful soup that captures all those beloved cheesesteak flavors without the fuss.