Tatsoi Leaves are from the Brassica family, Tatsoi is a dark green Asian salad greenthat has a spoon like shape, a pleasant and sweet aroma and a mild mustard flavour, similar to bok choi.
Tatsoi (Brassica narinosa or Brassica rapa var. rosularis) also called Spinach mustard, Spoon mustard, or Rosette bok choy, is an Asian variety of Brassica rapa grown for greens. This plant has become popular in Australian cuisine as well.
The plant has dark green spoon-shaped leaves which form a thick rosette. It has a soft creamy texture and has a subtle yet distinctive flavour.
It can be grown to harvestable size in 45–50 days, and can withstand temperatures down to –10°C (15°F). Tatsoi can be harvested even from under the snow.
It is generally eaten raw, but may be added to soups at the end of the cooking period. When tatsoi is mixed with other greens it enhances the flavour and nutritional value. It is an ingredient in many other salad mixes