Ingredients for 6 servings:
1. 1 lb dried black beans
2. 4 cups fat-free low-sodium chicken broth
3. 2 cups chopped onions
4. 1 cup water
5. 1 tablespoon ground cumin
6. 2 bay leaves
7. 1 serrano chili, finely chopped
8. 2 tablespoons fresh lime juice
9. 1 teaspoon kosher salt
10. 1/4 cup chopped fresh cilantro
11. 3 tablespoons reduced-fat sour cream
12. fresh cilantro stem (for garnish)
Directions:
1. Sort and wash beans; place in a large bowl. Cover with water to 2 inches above beans; cover and let stand 8 hours. Drain.
2. Combine beans, broth, and next 5 ingredients in an electric slow cooker. Cover and cook on LOW 10 hours.
3. Discard bay leaves. Stir in juice and salt. Ladle 1-1/2 cups soup into each of 6 bowls; sprinkle each with 2 t. chopped cilantro. Top each serving with 1-1/2 t. sour crean. Garnish with cilantro sprigs, if desired.