African Sweet Potato & Peanut Soup

I made this wonderfully different soup for Sunday night dinner. Sweet potatoes, peanuts and spinach, what a combination! But oh, so good.

Large can of Chicken Broth (I used the 99% Fat Free kind)
2 T. Peanut Oil (or veg. oil)
1 Medium Onion, diced
1 T. Minced Ginger
1 T. Minced Garlic
2 teaspoons ground cumin
1/2 tsp. salt (optional)
1/4 teaspoon ground cinnamon
1/8 teaspoon crushed red pepper
1/4 teaspoon ground coriander
1/2 Lb. Cooked Chicken, cut into bite size pieces
2 Sweet Potatoes, peeled and cubed
1/2 lb. Spinach (or Kale, your choice)
3/4 C. Chopped Peanuts (I used unsalted, dry roasted)
1/2 C Peanut Butter, chunky or smooth, your choice
Cilantro for garnish, if desired

Saute onion in peanut oil, over medium heat, for about 5 minutes.
Add garlic and ginger. Saute 3 minutes.
Add chicken broth and potatoes. Add spinach, peanuts and peanut butter.
Cook soup over low heat for about 1 hour.