Sweet Potato Kale soup

1. large sweet potato, peeled and cut into 1/2 inch cubes (about 1 pound). 2. large onion, chopped. 3. garlic cloves, minced. 4. ounces kale, de-stemmed and chopped. 5. (15 ounce) cans low-sodium white beans, ...More on ==>>(http://www.rktoday.com/news/sweet-potato-kale-soup/)