This paleo soup is perfect for ushering in fall: It's hearty enough for the beginning of soup season, yet brothy and veggie-packed so that it doesn't feel too heavy. Pair it with a slaw or kale side salad for a light, satisfying dinner. This recipe is ideal for a weekend, when you can check on the slow cooker after just a few hours; though you won't be able to leave the soup unattended all day, this still offers the benefit of hands-free, fuss-free cooking.