This is a common green in China. It can be steamed just like spinach, eaten raw in salads, or sautéed with other vegetables.
Try this:
Sautee chopped Bok Choi with sliced zuchinni. Drain. Put in casserole dish. Make 2 pieces of wheat toast. Crumble the toast in a blender, cuisinart (or just your hands) add to the crumble mix a little rosemary, chilantro, salt and pepper. I like to spash a tiny bit of hot sauce. Sprinkle over your steamed vegetables. Add dash of olive oil. Grate a nice, hard cheese over top and broil for a minute or two until done. Eat.
— Farmer Donna