Combine all the ingredients except the beef and cooking oil.
Coat evenly each piece of meat with the marinade. In a plastic container with cover, pile beef pieces one on top of the other.
Cover and keep refrigerated overnight or until ready to cook. Heat oil in a wok at high heat, fry marinated beef in batches for 3-5 minutes each side or until color changes to brown and edges start to caramelize.
Serve hot with fried rice and egg.