Step 1: Cook the Pasta

1. Bring a large pot of salted water to a boil. Add the pasta and cook according to the package instructions until al dente.
2. Reserve ½ cup of pasta water, then drain the pasta and set it aside. Toss it with a drizzle of olive oil to prevent sticking.

Step 2: Season and Cook the Chicken

1. Pat the chicken breasts dry with paper towels. Generously coat both sides with Cajun seasoning, ensuring even coverage.
2. Heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Add the chicken breasts and sear for 5-6 minutes on each side, or until they’re golden brown and cooked through (internal temperature should reach 165°F/74°C).
3. Remove the chicken from the skillet and let it rest for 5 minutes before slicing it into strips.

Step 3: Sauté the Vegetables

1. In the same skillet, add 2 tablespoons of butter and 1 tablespoon of olive oil. Heat over medium heat.
2. Add the chopped onion, red bell pepper, and green bell pepper. Sauté for 5-7 minutes, or until the vegetables are soft and slightly caramelized.
3. Stir in the minced garlic and cook for 1 minute, until fragrant.

Step 4: Make the Creamy Sauce

1. Reduce the heat to low and slowly pour in the heavy cream, stirring constantly. Add the chicken broth and whisk to combine.
2. Stir in 1 teaspoon of Cajun seasoning, smoked paprika, onion powder, and garlic powder. Adjust the seasoning to taste with salt and pepper.
3. Gradually stir in the Parmesan cheese, whisking until the sauce is smooth and creamy. If the sauce is too thick, add a splash of reserved pasta water to reach your desired consistency.

Step 5: Combine Everything

1. Add the cooked pasta to the skillet with the sauce, tossing to coat the noodles evenly.
2. Add the sliced chicken back into the skillet, tossing everything gently to combine. Let the dish simmer for 2-3 minutes to meld the flavors.

Step 6: Garnish and Serve

1. Remove the skillet from heat and garnish the dish with freshly chopped parsley, extra Parmesan cheese, and red pepper flakes if desired.
2. Serve the Creamy Cajun Chicken Pasta immediately and enjoy!