Boil caraili in 3 cups water with ½ teaspoon salt added for 3 minutes. Note: This will get some of the bitterness out.
Season beef with ½ teaspoon salt, 1 teaspoon soy sauce, pepper, corn starch, cooking wine and a little water. Mix thoroughly and marinate for 10 minutes.
Heat 1 tablespoon oil in the wok . Add onion and ginger. Stir for 1 minute. Add beef and ½ teaspoon salt. Stir evenly until beef changes colour and is completely cooked. Note: This step is critical. You have to make sure the beef is cut into thin strips and is fully cooked. You should not see any blood in the meat when cooked.
Add boiled caraili and keep stirring for 2 mins. Add soy sauce and sesame oil and mix thoroughly. Serve hot.