Mary Berry bashes the steak for her beef stir-fry before ... oil and fry the red peppers and onion for 3–4 minutes over a high heat. Tip in the white parts of the Chinese leaves and fry for ...
Stir fry for 1-2 minutes, or until just browned all over. Remove the beef from the wok and set aside. Add the peppers to the wok and stir fry for 1-2 minutes, then add the oyster sauce ...