Lentil Soup(Greek)  
["1 c. lentils", "2 qt. beef or chicken broth", "salt and pepper", "1 onion, chopped", "1 carrot, chopped", "1 clove garlic, minced", "1/4 c. olive oil", "1/2 c. tomato sauce", "vinegar (optional)"]
["Simmer lentils in stock with salt and pepper to taste for 1 hour. Add remaining ingredients, except vinegar.", "Cook until vegetables are tender, about 1/2 hour. Add a teaspoon of vinegar to each bowl as it is served, if desired.", "Cooking time:", "1 1/2 hours."]
["lentils", "beef", "salt", "onion", "carrot", "clove garlic", "olive oil", "tomato sauce", "vinegar"]