Cook to tender in microwave or in a large kettle. Boil lentils in 5 cups of water, ... add stewed tomatoes, tomato sauce, and pepper. Boil, uncovered, until soup thickens and lentils are tender ... 10 bowls of soup.
Puree tomatoes. Heat olive oil ... minutes. Add the lentils, tomatoes, 6 cups of ... water as the soup starts to thicken. Stir occasionally ... few minutes before serving.