In a 6 quart slow cooker, place all ingredients (except milk) and cover with lid.
Cook on low setting cook for 8 hours.
Use hand held blender tp puree vegetables until smooth. Add milk and more apple juice or chicken broth until soup is smooth and soup is consistency of a light cream soup. Top each bowl of soup with a teaspoon of sour cream or yogurt and a sprinkle of cinnamon.