Add the broth: Pour in the chicken broth and bring the mixture to a boil, stirring occasionally.
Cook the pasta: Add the pasta to the boiling broth and cook according to package instructions until al dente, usually about 8-10 minutes.
Stir in cream and cheese: Reduce the heat to low. Stir in the heavy cream and grated Parmesan cheese until the cheese has melted and the broth is smooth and creamy.
Incorporate chicken: Gently fold the shredded Cajun chicken into the soup, and season with salt and pepper to taste.
Simmer and serve: Allow the soup to simmer for a few minutes to let the flavors meld. Serve hot, garnished with chopped green onions.
Notes
Cook pasta until al dente and taste for seasoning before serving.