Though it???s primarily used as a lettuce green, watercress can also be used in soups and sauces and to lend a pleasant, peppery flavor to roasted meats and poultry.Hailed as a ???superfood,??? watercress is high in phytochemicals and antioxidants, contains significant amounts of folic acid, calcium, iron and iodine, and is an excellent source of vitamins A, C and K. It may also have cancer-suppre