To modify this classic, we substituted a dollop of yogurt in place of sour cream.
All beans take a little extra time to prepare, but they are well worth the effort.
One cup of the black beans used in this soup provides 15 grams of protein, .9 grams of fat and lots of fiber, vitamins and minerals. Otherwise, put the beans and 4 cups water in a large saucepan, bring to a boil, reduce heat slightly and let boil for 2 minutes. Remove from heat and let stand for 1 hour. Drain and discard the water. Add 3 cups of fresh water and the broth.