How to Make It
Coat a 5- to 6-quart slow cooker with cooking spray. Place broth and next 8 ingredients (through garlic) in slow cooker; stir well. Cover and cook on low 7 hours.
Process chickpeas, 3/4 cup water, oil, and lemon juice in a blender until smooth. Add chickpea mixture and kale to slow cooker; stir well. Cover and cook on low 30 minutes. Stir in vinegar.