In a medium bowl, combine the diced chicken with 1 ½ tablespoons of cajun seasonings and allow to marinate for 5 minutes.
Heat 1 tablespoons of olive oil in a large pot over medium-high heat. Saute the chicken for 2-4 minutes, stirring as require to ensure it cooks all the way through. Remove the chicken to a large dish.
Heat the remaining 1 tablespoon of oil over medium-high heat, add the bell peppers, onions, and mushroom. Cook the veggies for 1 minute. Add the minced garlic and the remaining 1 tablespoon of cajun seasoning, stir to combine and let cook 30 seconds. Remove the veggies to the same dish as the chicken.
Reduce the heat to medium, add the broth, cream, and pasta to the pot and bring to a boil. Reduce the heat to medium-low, cover and let the pasta cook for 12-14 minutes or until the pasta is tender. Add the chicken and veggies back into the pot. Sprinkle in the parmesan cheese. Stir to combine. Top with basil and serve warm.