Season sliced chicken with Cajun spices, salt, and pepper, allowing it to rest briefly so the flavors absorb properly before cooking.
Boil pasta in salted water until al dente, then reserve some pasta water to help adjust sauce consistency later.
Sear the chicken in a hot pan until golden and cooked through, ensuring it develops a flavorful crust without overcooking.
Sauté onions, garlic, and bell peppers in the same pan to build a flavorful base that enhances the final sauce.
Add broth and cream, then season and simmer until slightly thickened before incorporating Parmesan for richness.
Combine pasta and chicken with the sauce, using reserved pasta water if needed to achieve a smooth, glossy texture.
Garnish with parsley and extra cheese, then serve immediately for the best flavor and consistency.