Because lentils are tiny-sized legumes, they can be cooked directly in liquids without any prior soak time. They're the perfect candidate for stews, chilis, and soups like our easy Lemon Lentil Soup Recipe. Simply rinse and dry lentils in a colander, drain, and add to your stews, soups, and chili. Lentils generally become tender with 30 minutes of cook time.