In your favorite pot, sauté the onions, carrots, celery with a bit of oilve oil about 5 minutes. Add the spices (cinnamon, turmeric and cumin) and the tapioca flour and strir well. Add the tomatoes, cilantro, bay leaf and garlic and stir well. Add lentils, amarath. Add 10 cups of cooled water (or broth).