Another recipe to try:

Sweet Potato and Kale soup

4 oz. fresh kale - cut out and discard thick veins, coarsely chop leaves.
1 Lg. onion, chopped
3 1/2 tsp Italian seasoning (oregano, basil, thyme)
2 tsp. olive oil
3 14 1/2 oz cans of veg broth (or 1 1/2 quarts)
2 15 oz cans of white kidney or cannelloni beans, drained and rinsed
1 lb. sweet potatoes, peeled and cubed
1 to 2 garlic cloves, minced (the printed recipe called for 12 cloves, and I think that's a misprint. That's too much garlic for this amount of soup--and I like garlic.)
1/2 tsp salt
1/4 tsp pepper

In a dutch oven, saute onion and italian seasoning in oil until onion is tender.
Add broth, beans, sweet potatoes, and kale. Bring to a boil, reduce heat and simmer uncovered for 10 minutes. Stir in garlic, salt, and pepper. Simmer 15 minutes or until sweet potatoes are tender.