This fall our Tatsoi has been a big hit at the market.
My favorite way to fix it is very simple.
In a wok, I add a few tablespoons of butter, some garlic from Rattles Garden and the cut up stalks from the Tatsoi on high flame. After a about 4-5 minutes of searing the stalks I add the leaves.
Another few minutes in the Wok and its ready!
This is a great side no matter what the theme.