Marinate Chicken with Cajun seasoning blend and Smoked paprika for at least 30 minutes.
Cook pasta according to package directions. Drain and set aside.
In a large skillet, cook Chicken until browned and cooked through. Remove from skillet and slice.
In the same skillet, melt Butter over medium heat. Whisk in flour and cook for 2-3 minutes to create a roux.
Gradually whisk in Chicken stock until smooth. Bring to a simmer.
Stir in Heavy cream, Cajun seasoning blend, Garlic, Black pepper, Cayenne pepper, and Worcestershire sauce. Simmer for 8 minutes, stirring occasionally.
Add bell peppers and Onion to the Sauce and cook until softened, about 7 minutes.
Add cooked pasta and sliced Chicken to the Sauce. Toss to coat.
Garnish with chopped green onions and Parmesan cheese and serve immediately.
