Hearty Lentil Soup

I heard this recipe on a radio show last year. When you're looking for a healthy, cheap, easy meal that keeps you warm on cold fall and winter days and nights, this is it.

1 1/2 cups Lentils cooked and drained
1 carrot chopped
2 tomatoes chopped
8 oz. tomato sauce
1 small onion chopped
3 potatoes chopped
a handful of cilantro
salt and pepper to taste
water
cumin 1/2 tsp

In a large pot sautee the onions for a few minutes with 2 tbsp olive oil until translucent. Then add carrot and potatoes and cumin. Cover with water and bring to a boil. Then add tomato sauce, salt and pepper to taste and cook until carrots and potatoes are tender. Add cilantro and season to taste with salt and pepper.