Cook the pasta according to package directions, then drain and set aside.
Toss the sliced chicken with 1 tablespoon of Cajun seasoning.
Heat the olive oil in a large skillet over medium-high heat and cook the chicken for 5-6 minutes until golden. Transfer to a plate.
Add the bell pepper and garlic and cook for 2 minutes.
Pour in the chicken broth, heavy cream, remaining Cajun seasoning, and parmesan. Simmer for 3-4 minutes until slightly thickened.
Return the chicken and add the pasta, tossing to coat. Garnish with parsley and serve.