If you're looking for a nutritious vegetable that is quick and easy to grow and to cook, Pac Choi is a great choice. Pac Choi is a plant that is in the cabbage (brassicacea) family. It originated in China, where it has been grown for over 1500 years. It was introduced into the US during the late 19th century by Chinese immigrants. Since then, it has gained popularity, though in most areas of the country, it is still considered somewhat exotic.