Hanoi Noodle Soup with Chicken, Baby Tatsoi, and Bok Choy

Hanoi Noodle Soup with Chicken, Baby Tatsoi, and Bok Choi

Baby tatsoi, also known as spinach mustard, has been an Asian staple for thousands of years.Christopher Hirsheimer

Baby tatsoi, sometimes called spinach mustard, has been an Asian staple for thousands of year. Its mustardy taste makes it a favorite for Vietnamese dishes.