Leeks are a sweet, subtle-flavored member of the onion family, whose appearance is similar to green onions— but larger and stalky. After thoroughly washed, the white parts of a leek stalk can be enjoyed raw in salads or both the white and light green parts can be cooked to perfection in soups, stews, and other slow-simmer recipes. Leeks add an incredible, distinguished flavor profile placed in high regard.