Ingredients

1. 1/2 cup chicken or vegetable broth
2. 1 tablespoon oyster sauce
3. 1 tablespoon Chinese cooking wine, dry white wine or dry sherry
4. 1 tablespoon soy sauce
5. 1/4 teaspoon sugar
6. 1/4 teaspoon salt
7. 1 tablespoon peanut oil or vegetable oil
8. 3 scallions, cut into 1-inch lengths
9. 1 tablespoon minced garlic
10. 1 teaspoon minced fresh ginger
11. 1 pound choy sum, sliced crosswise at 3-inch intervals, thickest stalks halved lengthwise
12. 1 teaspoon cornstarch mixed with
13. 1 tablespoon cold water

Directions

1. In a small bowl, combine the broth with the oyster sauce, wine, soy sauce, sugar and salt.
2. Set a large wok over high heat. When it's hot, add the oil and swirl to coat. After 20 seconds, add the scallions, garlic and ginger and stir-fry for 30 seconds. Add the choy sum and stir-fry for 2 minutes; press it against the wok, then stir and press again. Add the sauce in the bowl and bring to a boil, then cover and simmer for 3 minutes. Add the cornstarch mixture and continue stir-frying until the sauce thickens, about 15 seconds. Transfer the greens to a small platter and serve hot.
   
   

Notes

If you cannot find choy sum, substitute chopped broccoli rabe, mustard greens or spinach.