Rinse and soak the beans

• Rinse the seven bean mix under cold water.
• Cover with plenty of water and soak overnight, about 8 hours.

Rinse again

• Drain the soaked beans and rinse them one more time.

Load the slow cooker

• Dump the beans into the slow cooker.
• Add the water, onion, sweet potato, garlic and chili powder.
• Squeeze in the lemon juice and stir everything together.

Cook the soup

• Cover and cook on low until the beans and sweet potato are tender, stirring occasionally.

Serve

• Taste, adjust the seasoning and enjoy.