Creating a flavorful Southwest Alfredo Penne Pasta is straightforward if you follow these simple steps:

1. Cook Pasta: Bring a large pot of salted water to a boil. Add penne and cook according to package instructions until al dente. Drain and set aside.
2. Prepare the Sauce: In a large skillet over medium heat, melt the butter. Once melted, add the heavy cream and stir.
3. Add Spices: Mix in garlic powder, onion powder, smoked paprika, chili powder, and cumin. Stir until combined and let simmer for about 3-5 minutes.
4. Incorporate Chicken or Shrimp: If using, add the diced chicken or shrimp to the skillet. Cook until heated through.
5. Add Vegetables: Stir in the roasted corn and chopped bell peppers. Cook for an additional 2-3 minutes until the peppers are tender.
6. Mix in Cheese: Gradually stir in the Parmesan cheese, allowing it to melt and create a creamy sauce. Season with salt and pepper to taste.
7. Combine Pasta and Sauce: Add the cooked penne to the skillet, tossing to thoroughly coat the pasta in the sauce.
8. Add Lime: Squeeze the juice of one lime over the pasta and mix well for a zesty kick.
9. Serve: Remove from heat, and garnish with fresh cilantro before serving.

These steps allow you to create a creamy, flavorful Southwest Alfredo Penne Pasta that is sure to impress!