Sauce     
Salt    1/2 tbsp
Light Soy Sauce    1 tbsp
Pepper    some
Yellow Wine    1 tbsp

    
Steps
1)   Wash lean pork, mince into small fine dices
2)   Soak dry black mushroom, cut into small dices
3)   Heat wok with 2 tbsp of oil, stir fry pork and black mushroom
4)   Add sauce when pork is cooked, stir fry well then pour in a large bowl
5)   Whisk well the egg with same volume of chicken stock and 2 tbsp of water
6)   Pour the egg into bowl gently, and stir mix well gently
7)   Put inside a steam case, steam the egg in medium heat when water is boiled
8)   Steam for approx. 10-12 minutes until egg is steamed solid
9)   Sprinkle chopped spring onion, serve

Remark 
tbsp -     table spoon
Put the steam case in only  AFTER  the steaming water is boiled !!! 
Do not cover the lid of wok during steaming,
              you can inspect the eggs and make it's surface becomes more smooth
Steaming time and temperature are very important to the result !!