Think of sweet potatoes and you probably think of starchy roots candied or French-fried as side dishes. Or may be a dessert such as sweet potato pie to end a hearty meal. For many Chinese, however, sweet potato greens would also come to mind. These leaves are commonly used as a vegetable in Chinese home cooking. Sweet potato greens are just one out of multitude of Asian produce you can get in many Asian markets throughout New York City. On Labor Day (September 6th) you can learn how to identify and to cook this and other Asian vegetables at the first Asian Feastival in Flushing.