The name comes from Mandarin (塌棵菜 tā kē cài). It is also called Chinese flat cabbage, rosette pakchoi or broadbeaked mustard, spoon mustard, or spinach mustard. Cantonese transliterations include tat soi, tat choy.
A distinctly different kind of Asian green, TATSOI is a small, spoon-shaped green that delivers a unique flavor experience. A stocky plant similar to bok choy, tatsoi is native to China where it is believed to have been cultivated since 500 AD.