2 c. uncooked lentils
8 c. water or vegetable stock
1/2 onion, chopped
1 stalk celery, chopped
1 sm. potato
2 tbsp. oil
2 bay leaves
1 1/2 - 2 tsp. salt
2 tsp. vinegar

Mix all ingredients, except vinegar, and cook until lentils are very soft, about 1 hour. Add vinegar and serve.