Tah Tsai
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Tah Tsai (Brassica rapa Perviridis), also known as Komatsuna and Mustard Spinach, is a dark green brassica Mustard Green with 6 inch (15.24 cm) or longer concave leaves.

Cultivation

Tah Tsai is very mild and easy to grow. Depending on the climate, it can grow all year long. In cooler climates, the Seeds should be sown in the spring through the fall. Tah Tsai can be used as a cut-and-come-again Leafy Green at any stage of its growth.

Culinary Uses

The leaves of Tah Tsai are tender and mild. Use Tah Tsai as you would Spinach or Mustard GreensSteamed, or in Stir FriesSalads or Soups. A general rule of thumb is to use the shorter, 1-3 inch (2.54-7.62 cm) leaves in Salads, the medium-sized 3-6 inch (7.62-15.24 cm) leaves in Stir Fries and the largest leaves for Soups, Steaming or Pickling.

Substitutes

Though the two are closely related, Tah Tsai is not the same plant as Tatsoi (brassica rapa varrosularis).

Gluten Free

Yes

Low Fat

Yes

Low Calorie

Yes