In a large skillet, saute sliced chicken and red bell pepper in butter, cajun seasoning, red pepper flakes and ground black pepper until chicken is cooked, about 5-10 minutes.
Add in grated parmesan, heavy cream, and flour. Mix thoroughly.
Add in cooked pasta and let sit for 5 minutes.
Notes
Feel free to add as much or as little red pepper flakes depending on your preferred spice level!