Vegetarian Black Bean and Sweet Potato Soup with Lime
A hearty sweet potato and black bean soup with warm spices, a bright hit of lime, and a creamy spoonful of yogurt or sour cream.
Prep 20 min · Cook 1 hr · Total 1 hr 20 min · Makes 6 servings

Ingredients
- 1 T olive oil
- 1 large onion, diced small
- 1 tsp. minced garlic
- 3/4 tsp. ground coriander
- 3/4 – 1 tsp. ground cumin
- 1/4 tsp. ground fennel
- Fresh ground black pepper to taste
- 1 large or 2 medium sweet potatoes, cut into 1/2 inch pieces
- 2 cans black beans, rinsed and drained
- 4 cups homemade vegetable or chicken stock
- Salt to taste
- 2 T fresh-squeezed lime juice
- Greek yogurt or sour cream for serving
- Lime wedges to squeeze into the soup, optional
Directions
- Warm the olive oil in a heavy soup pot. Stir in the diced onion and cook over medium heat for 6-8 minutes, until the onion is beginning to take on a little color.
- Add the minced garlic, ground coriander, ground cumin, ground fennel, and fresh-ground black pepper. Cook for another 1-2 minutes, stirring, just until the spices smell toasty and fragrant.
- While the onion cooks, peel and chop the sweet potato, and rinse the beans until the foamy bubbles are gone. Drain the beans well.
- Once the onion and spice mixture is ready, add the diced sweet potatoes, black beans, and vegetable or chicken stock to the pot. Season with salt to taste.
- Simmer the soup over medium-low heat for about 30 minutes, until the sweet potatoes are soft enough to fall apart. As the soup cooks, some foam from the beans may collect on the surface; skim it away with a large spoon or stock skimmer.
- When the sweet potatoes are tender, scoop out 3 cups of the beans and sweet potatoes with a slotted spoon and set them aside. Puree the soup left in the pot with an immersion blender, or transfer it carefully to a regular blender. If using a regular blender, work with the hot soup cautiously: fill the jar only about 3/4 full, and hold the lid down with a towel or hot pad.
- Return the reserved beans and sweet potatoes to the pot, then let the soup simmer for about 15 minutes more.
- Taste and adjust the salt if needed. Stir in the lime juice and continue simmering for about 5 minutes.
- Serve the soup hot, topped with a dollop of fat free Greek yogurt or light sour cream.
- If you like, put out lime wedges so anyone who wants a brighter bowl can squeeze in extra lime juice.