Lentils are a great source of protein and one of the most iron-rich vegetables. They also contain folate, vitamin B-1 and minerals, and are high in dietary fiber: 11 percent for red/pink lentils and 31 percent for green lentils.
Heat the oil in a stock pot or Dutch oven and add the vegetables, cooking until they begin to get soft.
Rinse the lentils and pick out any unsightly ones. Add the lentils, vegetable broth and crushed tomatoes to the pot.
Bring to a boil and then simmer for 15 to 20 minutes, or until desired tenderness of lentils is achieved.
Serve with rice or orzo pasta, but note that this will add to the 5 Weight Watchers points.