Follow these straightforward steps to create your delectable Philly Cheesesteak Pasta:

1. Cook the Pasta: Bring a large pot of salted water to a boil. Cook the penne pasta according to the package instructions until al dente. Drain and set aside.
2. Cook the Steak: In a large skillet, heat olive oil over medium-high heat. Add the thinly sliced steak, seasoning with salt and pepper. Stir-fry for about 3-4 minutes until browned. Remove from the skillet and set aside.
3. Sauté Vegetables: In the same skillet, add the sliced onion, green bell pepper, and mushrooms (if using). Sauté for 5-7 minutes, or until the vegetables are tender. Add minced garlic and cook for an additional minute.
4. Create the Sauce: Pour in the beef broth and scrape any browned bits from the bottom of the skillet. Let it simmer for 2-3 minutes.
5. Add Cream: Reduce heat to low. Stir in the heavy cream, mixing until combined. Allow to cook for another 2-3 minutes until slightly thickened.
6. Combine Ingredients: Return the cooked steak to the skillet. Add the drained pasta and 1 cup of provolone cheese, stirring everything until well combined and the cheese melts.
7. Final Touches: Check seasoning and adjust with salt and pepper as needed. If the sauce becomes too thick, add a splash more of beef broth or cream.
8. Serve Immediately: Remove the skillet from heat. Plate your Philly Cheesesteak Pasta hot, garnished with additional provolone and chopped parsley if desired.

Enjoy this culinary delight that merges the comforting flavors of cheesesteak into a rich pasta dish!