01 - Bring a large pot of salted water to a rolling boil. Add pasta and cook until al dente according to package directions. Drain thoroughly in a colander and set aside.
02 - Heat 1 tbsp olive oil in a large skillet over medium-high heat. Season chicken strips with half the Cajun seasoning, smoked paprika, thyme, salt, and pepper. Sauté until golden brown and cooked through, approximately 5-6 minutes. Transfer to a plate and reserve.
03 - In the same skillet, add sliced andouille sausage. Cook for 2-3 minutes until edges are browned and fat has rendered. Remove with a slotted spoon and combine with the cooked chicken.
04 - Add remaining 1 tbsp olive oil to the skillet. Introduce sliced bell peppers, red onion, and minced garlic. Sauté, stirring frequently, until vegetables are softened and fragrant, about 3-4 minutes.
05 - Reduce heat to medium. Pour in chicken broth, using a wooden spoon to scrape up any browned bits from the pan bottom. Add heavy cream and remaining Cajun seasoning. Bring to a gentle simmer while stirring continuously.
06 - Sprinkle grated Parmesan cheese into the simmering sauce. Stir constantly until cheese has completely melted and sauce has thickened enough to coat the back of a spoon, about 2-3 minutes.
07 - Return cooked chicken and sausage to the skillet. Add drained pasta and toss everything together until evenly coated in the creamy sauce. Taste and adjust seasoning if necessary. Serve immediately, garnished with fresh chopped parsley and sliced green onions.