African Yam Soup
   Calls for onion, tomatoes, tomato juice, and tomato paste.
   http://psa-rising.com/eatingwell/yamsoup.htm

Apple and Yam Soup
   Combines yams, apples, chicken broth, yogurt, and onions. Serves four.
   http://food.sunset.com/sunset/recipefinder.dyn?action=displayRecipe&recipe_id=682444

Cajun Yam-Pecan Bisque
   Lists blackened seasonings, onions, and chicken stock.
   http://www.recipesource.com/soups/soups/07/rec0735.html

Cream of Sweet Potato Soup
   Consists of nutmeg, soy milk, and vegetable broth.
   http://www.recipesource.com/soups/soups/02/rec0296.html

Cream of Sweet-Potato Soup
   Recipe for a chicken bouillon based soup containing flour, sherry, shallots, pumpkin spice, and almonds.
   http://www.cdkitchen.com/recipes/recs/293/Cream_of_Sweet_Potato_Soup11604.shtml

Garlic and Sweet Potato Soup
   Chicken stock with chives and feta cheese.
   http://www.recipesource.com/soups/soups/20/rec2012.html

Holiday Sweet Potato Soup
   Sherry, walnuts, onion, and shallots with chicken stock.
   http://www.recipesource.com/soups/soups/07/rec0747.html

Puree of Sweet Potato Soup
   Uses low-sodium chicken broth, cranberry sauce, sour cream, and nutmeg.
   http://search.yumyum.com/recipe.htm?ID=9145

Sweet Potato Soup
   Consists of carrots, celery, nutmeg, and soy milk.
   http://www.recipesource.com/soups/soups/sweet-potato1.html

Sweet Potato Soup (Pressure Cooked)
   Contains apples, grated orange peel, celery, and onion.
   http://www.recipesource.com/soups/soups/22/rec2287.html

Sweet Potato Soup with Buttered Pecans
   Calling for white wine, potatoes, sour cream, leek, carrots, and onion.
   http://www.recipesource.com/soups/soups/02/rec0260.html

Sweet Potato and Pepper Soup
   Combines sour cream, Bick's hot pepper relish, and chicken broth.
   http://www.recipesource.com/soups/soups/10/rec1050.html

Sweet Potato and Sesame Soup with Coconut Pesto
   Recipe that uses a long ingredient list.
   http://www.bbc.co.uk/food/recipes/database/sweetpotatoandsesame_1079.shtml

Sweet Potato and Turnip Soup
   Low fat vegan recipe seasoned with rosemary.
   http://www.fatfree.com/recipes/soups/sweet-potato-turnip-soup

Yam & Apple Soup
   chicken stock with maple syrup, cream, nutmeg, and onion.
   http://www.recipesource.com/soups/soups/15/rec1510.html

Yam and Split Pea Soup with Fresh Ginger
   Contains leeks, celery, Braggs aminos, and cayenne pepper.
   http://www.recipesource.com/soups/soups/15/rec1562.html