Season Chicken: In a mixing bowl, coat chicken breasts with olive oil and sprinkle with Cajun seasoning, garlic powder, onion powder, smoked paprika, salt, and black pepper.

Brown Chicken: Heat a skillet, add olive oil, and brown the chicken for 2-3 minutes on each side.

Transfer to Slow Cooker: Move the browned chicken to the slow cooker.

Add Vegetables: Layer bell pepper, onion, and garlic over the chicken.

Add Liquids: Pour diced tomatoes and chicken broth over the chicken and vegetables.

Cook Chicken: Cover and cook on low for 4-5 hours or high for 2-3 hours.

Shred Chicken: Remove and shred the chicken before returning it to the slow cooker.

Add Cream and Cheese: Stir in heavy cream and Parmesan cheese until well mixed.

Cook Pasta: While the sauce simmers, cook pasta according to package instructions.

Combine Pasta and Sauce: Add cooked pasta to the sauce in the slow cooker and toss well.

Heat Together: Allow the dish to heat for an additional 15-20 minutes.

Serve: Ladle into bowls and garnish with parsley before serving.