African Sweet Potato-Peanut Stew

In blender or food processor with knife blade attached, blend garlic, cilantro, tomatoes with their juice, peanut butter, cumin, cinnamon, ground red pepper, and 3/4 teaspoon salt until pureed. Into 4 1/2- to 6-quart slow-cooker bowl, pour peanut-butter mixture; stir in water. Add sweet potatoes and garbanzo beans; stir to combine. Cover slow cooker with lid and cook as manufacturer directs on low setting 8 to 10 hours or on high setting 4 to 5 hours or until potatoes are very tender. About 10 minutes before sweet potato mixture is done, cook green beans as label directs. Gently stir green beans into stew.