1. In a 6-quart slow cooker, combine all ingredients except milk, cornstarch, and cheese. Stir well.
2. Cover and cook on low for 6 hours.
3. Mix cornstarch and milk together, and stir it in 30 minutes before the end.
4. Turn off heat, stir in cheese until melted. Serve hot.
Notes
You can use kielbasa or bratwurst instead of Andouille sausage.Add extra toppings like bacon bits, chives, or sour cream for extra richness.Store leftovers in the fridge for up to 3 days or freeze for 2 months.
Keyword german potato soup, sausage soup, slow cooker soup