Step 1

Combine beans and water in a large pot. Bring to a boil; reduce heat. Simmer, uncovered, for 10 minutes. Remove from heat. Cover and let stand for 1 hour. Drain and rinse beans.

Step 2

Transfer the beans to a 4-quart slow cooker. Stir in onion, jalapeno, garlic, broth, cumin, chili powder and salt.

Step 3

Cover and cook on Low for 9 to 10 hours or on High for 4 1/2 to 5 hours. Use a potato masher to coarsely mash the beans. Top each serving with cilantro and serve with lime slices or wedges for squeezing. If desired, top each serving with sour cream.