Slow Cooker Refried Beans

Ingredients

• 2 cups (12 oz.) dried pinto beans, rinsed and picked over for stones and debris
• 6 cups water, enough to cover beans plus 2 inches
• 1/2 tsp salt
• 2 tsp. black pepper, ground
• 1 cup chopped onion
• 1 clove (1 tsp.) garlic