This recipe is from the Williams Sonoma "Soup for Supper" cookbook. I think it is exceptionally good. While lentil soup is usually comfort food, this variation makes it a bit exotic, too. The fragrant Indian spices lighten and brighten the simple, homey flavor of the soup. Red lentils have a tendency to break down into a coarse puree as they cook, so if you prefer some texture, omit the blender or food processor step.