Prepare the sweet potatoes, onion, ginger and garlic.In a large pot, add the broth, onion, ginger, garlic, sweet potatoes, salt and pepper. Stir well and bring to a boil. Once boiling, cover with a lid and turn to simmer for 25-30 minutes until the sweet potatoes are fork tender.Add the beans (drained & rinsed) and kale and nutritional yeast. Return the lid and simmer an additional 10 minutes. Taste and add any more salt, if desired. I added some chili powder for a little heat at the end.