04Add the water, lentils, and rice, and bring to a boil over high heat.05Reduce the heat to low, cover, and simmer for 1 hour, or until the lentils and rice are tender.06Stir in the sweet potatoes and salt.07Cover, and simmer for 20 minutes, or until the sweet potatoes are tender.08Stir in the spinach, and cook for 5 minutes.