Heat the olive oil in a large pot over high heat. Add the garlic, sausage, and chicken. Cook until the garlic starts to brown and the chicken is no longer pink.
Sprinkle the Cajun seasoning over the sausage and chicken, stirring to coat them evenly.
Pour in the heavy cream and bring it to a boil.
Add the cooked pasta, stirring until everything is well combined.
Finish by adding the parmesan cheese and fresh parsley. Stir until the cheese melts and the pasta is coated with a thick sauce.