Pour out most of the oil, leaving just a few tablespoons, and quickly stir-fry green onions and ginger over a high flame. Add beef, oyster sauce, rice wine and corn starch paste. Continue to fry while mixing thoroughly, pour over kohlrabi and serve.
油倒出，留少許在鍋內，爆炒蔥薑，入牛肉、蠔油、酒和太白粉水，炒翻均勻，即可起鍋。