The problem is that kale's a bit tough and it doesn't seem to be a common ingredient in many recipes. Cooking your kale in the crock-pot for several hours gives it a chance to soften up. Plus kale is one of the vegetables in season during the winter months, making it perfect for a warm winter soup!
In addition to the kale there are carrots, beans, onions, garlic, and tomatoes in this soup - all of which are also great for you!
Hope you enjoy this White Bean & Kale Soup!