Sweet Potato Soup

ingredients :
2 sweet potatoes
2 white potatoes
1 turnip
1/2 cup heavy whipping cream
6 cups chicken broth
1 tablespoon brown sugar
1 1/2 teaspoons ground nutmeg
2 tablespoons margarine
salt to taste
ground black pepper to taste

Directions:
 .1Peel and cut vegetables into small, uniform pieces. Place in a pot, and cover with the chicken stock; use only the amount of stock needed to cover. Bring to a boil, and cook until vegetables are tender.
 2.Place vegetables and liquid into a food processor. Puree.
 3.Return pureed vegetables to the saucepan. Slowly stir in the cream, brown sugar, nutmeg, and butter. Add salt and pepper to taste