Cook the Italian sausage in a large pot over medium-high heat, breaking it apart as it cooks.
Season with CTH, Italian seasoning, and Cajun seasoning.
Cook until fully browned with no pink remaining. Drain excess grease if needed.
Add the diced onion, minced garlic, and chopped parsley. Cook for 2 minutes until the onion is soft and translucent.
Add the cubed potatoes, chicken broth, and entire jar of Alfredo sauce. Stir to combine. Cover and cook over medium heat for 20 to 25 minutes, stirring occasionally, until the potatoes are completely fork tender.
Taste and adjust seasoning. Serve immediately.