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B. r. subsp. narinosa
|Brassica rapa subsp. narinosa|
Tatsoi (Brassica rapa subsp. narinosa or Brassica rapa var. rosularis) is an Asian variety of Brassica rapa grown for greens. This plant has become popular in North American cuisine as well, and is now grown throughout the world.
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'.
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.
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- Creasy, Rosalind (15 Mar 1999). The Edible Salad Garden. Vermont: Tuttle Publishing. p. 48. ISBN 9781462917617. Retrieved 16 March 2016.
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- "Nutrition Facts for Tatsoi (Spoon Mustard)". HealWithFood.org. Retrieved 17 March 2016.