Tatsoi is a wonderful, versatile Asian green, and is also known as “Asian spinach”. It can be used raw or cooked. Tatsoi substitutes well for spinach in any recipe, from sautés to quiches to dips or used raw in salads or on sandwiches. It has a mild yet rich green flavor, and is packed with good nutrients. Tatsoi is a member of the Brassica or cruciferous family of plants, known for its healthful properties.