African Sweet Potato Soup

From the cookbook, Soup, with forward by Eric Schlosser of Fast Food Nation fame, this yam-based gruel warms your belly, then kicks you in the ass! The chili oil adds a good bit of heat, so if you're more sensitive, go easy on this garnish.

Ingredients
2 tbsp. olive oil
1 onion, chopped
2 garlic cloves, finely chopped
2 tsp. finely grated ginger
1/4 tsp. crushed red pepper flakes
1 lb. sweet potatoes (I use yams), cut into small chunks
1 red bell pepper, seeded and chopped
1-8 oz. can diced tomatoes
1 tsp. cumin seeds, dry-roasted and crushed
1 tsp. coriander seeds, dry-roasted and crushed
1 qt. hot vegetable stock
2-3 tbsp. natural peanut butter
Chili oil, to serve

Directions
Dry-roast the spices by baking in an oven at 325 degrees until browned. Be cautious not to burn them. Crush using a mortar and pestle.

Heat the oil in a large pan, add the onion, and cook for about three minutes. Stir in the garlic, ginger and hot red pepper flakes. Cook for a minute or so more. Stir in the sweet potatoes, pepper, tomatoes, and crushed spices. Cook for two more minutes. Pour in the stock, bring to a boil, then simmer for 12 to 15 minutes, or until sweet potatoes are tender.

Remove from heat and process until smooth using a hand-held blender. (You could also use a food processor or standard blender, but really. Get a hand-held for $29 and you'll never look back.) Stir in the peanut butter, tasting to desired amount. Reheat gently and then drizzle a little chili oil over each bowlful to serve. Serves 4.