Step 1: Cook the Pasta

1. Bring a large pot of salted water to a boil.
2. Add the pasta and cook until al dente, following the package instructions (typically 10–12 minutes).
3. Drain the pasta, reserving ½ cup of pasta water for later use. Set aside.

Step 2: Cook the Beef

4. Heat olive oil in a large skillet over medium-high heat.
5. Season the thinly sliced beef with salt, pepper, and Worcestershire sauce.
6. Add the beef to the skillet and cook for 2–3 minutes per side, until browned and cooked through.
7. Remove the beef from the skillet and set it aside.

Step 3: Sauté the Vegetables

8. In the same skillet, add the sliced onions and diced bell peppers. Sauté for about 5 minutes, until softened.
9. Stir in the minced garlic and cook for another 30 seconds, until fragrant.

Step 4: Prepare the Cheese Sauce

10. Lower the heat to medium and pour in the milk and heavy cream, stirring to combine.
11. Gradually add the shredded provolone and cheddar cheese, stirring constantly until fully melted and smooth.
12. Season with garlic powder, onion powder, smoked paprika, and Dijon mustard.
13. If the sauce is too thick, add a splash of reserved pasta water to reach the desired consistency.

Step 5: Assemble the Dish

14. Return the cooked beef to the skillet and stir to combine with the vegetables and sauce.
15. Add the drained pasta, tossing everything together until fully coated in the creamy cheese sauce.
16. Simmer for 1–2 minutes to allow the flavors to meld.

Step 6: Serve and Garnish

17. Transfer to a serving dish and sprinkle with fresh parsley and grated Parmesan.
18. Serve immediately and enjoy!