Bok choy, also known as pak choy or pok choi, is a type of Chinese cabbage, that has smooth, wide, flat leaf blades at one end with the other end forming a cluster similar to that of celery. May be eaten cooked or raw.  High in fiber, vitamin C, vitamin K, vitamin A, and beta-carotene, this wildly popular green is also an excellent source of folate, calcium, and vitamin B6. It is also considered both a cruciferous vegetable and a leafy green vegetable.  Great in stir fries!