Bring a large pot of water to a rolling boil and add a pinch of salt. Cook 8 oz of penne pasta until al dente for about 10-12 minutes. Drain and set aside.

Heat 1 tbsp of olive oil in a large skillet over medium-high heat. Add 1 lb of sliced chicken breast seasoned with 2 tbsp of Cajun seasoning and cook until golden brown, about 5-7 minutes. Remove chicken and set aside.

In the same skillet, lower heat to medium and sauté 1 clove of minced garlic for about 30 seconds. Add 2 cups of heavy cream, stirring to combine.

Gradually mix in 1 cup of finely grated Parmesan cheese until melted. Cook 2-3 minutes until sauce thickens, seasoning with salt and pepper.

Toss the cooked penne pasta into the sauce, ensuring it's well-coated. Heat through for 1-2 minutes.

Serve the creamy Cajun chicken penne pasta garnished with chopped parsley.