Dating back to the Roman times, cress has long been an important source of nutrients for European and Asian populations. Today it's grown more for its delightful peppery flavor. It's the perfect extra ingredient to perk up a salad, sandwich, soup or hot dish. Cress is very popular in Asia, particularly in China, where it appears most frequently in soups. Some soups even feature cress as the main ingredient, accented by onion, garlic, butter and a few spices. Given the right conditions, cress is a hardy plant that prduces year round.