I'm twelve and what is this soup

West African Peanut soup (a la McNally Robinson's Prairie Ink Cafe)
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You will need:

• 2 tbsp olive oil
• 1 big onion, roughly chopped
• 2-3 cloves of garlic, minced or pressed
• 1 tbsp fresh ginger, grated
• 1/4 tsp cayenne pepper
• 4 big carrots, chopped
• 2 lbs sweet potatoes (3 or 4), diced
• 28 oz crushed tomatoes
• 1/2 cup peanut butter
• 8 cups vegetable stock
• 1/2 – 1 tsp salt
• pepper

Preparation:

1. Heat heavy-bottomed pot over medium-low heat. Pour in oil and sauté onion until translucent, about 5 – 10 minutes.
2. Add ginger and sauté 3 more minutes, stirring often.
3. Add cayenne pepper, carrots, sweet potatoes, tomatoes, peanut butter, vegetable stock and 1/2 tsp of salt.
4. Bring to a boil; then simmer until the vegetables are well cooked, about 20 minutes. Stir often.
5. Remove from heat and purée. Taste and decide if you’d like to add that other 1/2 tsp of salt. Grind pepper over.