Demand for Asian greens, such as bok choy, began in the 1990s. The noodles are stir-fried with beef cutlets, bok choy, and onion. Plants in the family Brassicaceae include arugula, broccoli, Brussel sprouts, bok choy, cauliflower, and turnips. These include rapini (broccoli rabe), bok choy, and Chinese cabbage. Bok choy (American English), pak choi (British English), or pok choi ("Brassica rapa" subsp. Both have many variations in name, spelling, and scientific classification, especially bok choy cultivars.