Lentil Tomato Soup is delicious and filling and very easy to make. Green vegetables make this soup a powerhouse of nutrition. Be sure not to overcook the lentils, as they can get rather mushy. After you stir in the tomatoes, let the soup simmer for 20 minutes if you have time in order to allow the flavors to blend a little more. And feel free to double the recipe and keep some in the fridge for a day or two, as the soup will get even better over this time.