If you can't find choy sum, whole baby bok choy makes a fine substitute.
Choy Sum (Asian Greens) with Garlic Sauce
If you can't find choy sum for this easy Asian greens recipe, whole baby bok choy makes a fine substitute.
1 1⁄2 lb. choy sum
1 tbsp. peanut oil
2 tbsp. coarsely chopped garlic
2 tbsp. soy sauce
Bring a pot of lightly salted water to a boil. Meanwhile, trim ends from choy sum. Blanch greens in the water until just tender, about 1 minute. Drain greens and set aside on a plate.
Heat oil in a wok or a skillet over medium-high heat. Add garlic and cook until lightly browned, 1–2 minutes. Add soy sauce and 1 tbsp. water; cook for 1 minute. Pour garlic sauce over greens.