Brown the sausage in a Dutch oven or heavy-bottomed stock pot. Remove when done, but leave the grease.
Saute the garlic, onion, celery, and bell pepper in olive oil.
Add chicken broth, Cajun seasoning, salt, paprika, and potatoes; simmer until potatoes are tender.
Stir in heavy cream, Parmesan, and cheddar cheese until smooth and creamy.
Return sausage to the pot, add parsley, and cook for additional 5 minutes.
Serve hot, garnished with parsley.
