To a large stock pot, add potatoes and chicken stock. Bring to a simmer and cook until potatoes are fork tender, about 20 minutes.
To a saute pan over medium heat, add sausage and chopped onion in pan and saute until completely cooked. Drain sausage mixture, add celery, and saute a few additional minutes. Add sausage mixture to stockpot with butter. Add cream and extra broth if needed. Add vinegar, vanilla, and parsley at end of cooking. Season, to taste, with salt and pepper.
This recipe has been updated and may differ from what was originally published or broadcast.