Crockpot Potato & Leek Chowder (4 Points)

3 medium potatoes -- peeled and diced
11 ounces canned corn - drained
1/2 cup chopped celery
1 leek soup, packet
4 cups water
1 cup nonfat dry milk powder
1/2 cup shredded Swiss cheese***

In slow cooker, combine potatoes, corn, celery, dry leek soup mix and water. Cover and cook on LOW 5 to 6 hours or until potatoes and celery are tender. Just before serving, gradually add dry milk powder to hot soup; gently whisk until well blended. Ladle into individual soup bowls; sprinkle with cheese, if desired.