Fill a large pot with salted water and bring to a boil. Add penne pasta and cook according to package instructions, about 10-12 minutes, until al dente.

Heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Add sliced smoked sausage and brown for 5-7 minutes until golden.

Add 1 diced onion to the skillet and sauté for 3-4 minutes until softened. Add 3 minced garlic cloves and stir until fragrant, about 30 seconds.

Stir in 2 tablespoons of Cajun seasoning, 1 teaspoon of smoked paprika, and black pepper to taste. Cook for 1 minute. Then mix in 1 tablespoon of tomato paste.

Pour in 1 cup of chicken broth and 1 cup of heavy cream, stir gently, and bring to a simmer for 2-3 minutes to thicken slightly.

Lower heat to medium-low, gradually stir in 1 cup of Parmesan cheese until melted. Add reserved pasta water if needed for consistency.

Add browned sausage and cooked penne pasta to the skillet. Toss for 2 minutes to coat the pasta with the sauce.

Let simmer over low heat for another 2-3 minutes and garnish with freshly chopped parsley before serving.