In Chinese or Cantonese restaurants, Chinese vegetables (choy sum) are often served two ways: brown sauce or white sauce--a recipe I am sharing with you today.
Rinse the vegetables with water and drain the water dry. Mix the white sauce ingredients and set aside.
Heat up a wok and add the cooking oil until it's smoking hot. Add ginger, stir-fry until light brown or aromatic. Add mushrooms and shrimp and do a few quick stir until the shrimps become half-cooked. Add vegetables into the wok and stir quickly. Transfer the white sauce mixture into the wok and continue to stir-fry until the sauce thickens. By then, the vegetables should be perfectly cooked, but not overcooked.
Dish out and serve immediately.