Yu Choy is of the Mustard Greens or Cabbage Family. It can be stir fried or boiled like spinach. I tried it both ways and prefer it boiled because it taste like really good spinach that way. I tasted bitterness in it when it was stir fried but preferred it sweet tasting like spinach.
I cleaned it up and put the Yu Choy in a pot stems down in boiling vegetable broth till the vegetable got as soft as spinach.
I drained the Yu Choy and added caramelized onions, fresh ground sea salt, fresh cracked black pepper and a splash of extra virgin olive oil. Yu Choy taste much better than baby spinach and also budget priced as all this Yu Choy only cost $2.18 from my local Asian Market.