Step 1: Cook the Pasta

1. Fill a large pot with water and bring it to a rolling boil. Add a pinch of salt.
2. Cook the penne pasta according to the package instructions until al dente (firm to the bite), approximately 10-12 minutes.
3. Drain the pasta, reserving about ½ cup of the pasta water, and set it aside.

Step 2: Brown the Ground Beef

1. Heat a large skillet over medium heat. Add the ground beef and season with salt and pepper.
2. Cook the beef for 6-8 minutes, breaking it into small crumbles, until browned and fully cooked.
3. Transfer the beef to a bowl and drain any excess fat from the skillet.

Step 3: Cook the Vegetables

1. In the same skillet, melt 2 tablespoons of butter over medium heat.
2. Add the chopped onion, green bell pepper, and sliced mushrooms.
3. Cook for 5-7 minutes, stirring occasionally, until the vegetables are tender and the onions are translucent.

Step 4: Prepare the Sauce

1. Return the cooked ground beef to the skillet with the sautéed vegetables.
2. Pour in the French onion soup and add the Worcestershire sauce. Stir to combine.
3. In a small bowl, mix 1 tablespoon of cornstarch with 2 tablespoons of cold water to create a slurry.
4. Stir the slurry into the skillet and cook for 2-3 minutes, allowing the sauce to thicken slightly.

Step 5: Add the Cheese

1. Lower the heat to low.
2. Add the coarsely chopped provolone cheese to the skillet.
3. Stir continuously until the cheese melts completely, creating a creamy, rich sauce.

Step 6: Combine the Pasta and Sauce

1. Toss the cooked penne pasta into the skillet with the sauce, beef, and vegetables.
2. Stir well to coat the pasta evenly. If the sauce is too thick, add a splash of the reserved pasta water to achieve your desired consistency.

Step 7: Serve and Enjoy

1. Divide the Philly Cheesesteak Pasta into serving bowls.
2. Garnish with extra provolone cheese or freshly chopped parsley, if desired.
3. Serve hot and enjoy the rich, cheesy goodness of this hearty dish!