- 
        
        Shell the prawns, make a
              shallow incision down the back of each prawns and remove the
              black intestinal parts.
 
        - 
        
        Wash and clean, then cut
              each shrimp in half lengthways.
 
        - 
        
        Make a criss-cross pattern
              on each half and marinate them with the egg white and 1/2
              tablespoon cornflour.
 
        - 
        
        Finely chop the onion and
              ginger root.
 
        - 
        
        Heat up about 4 1/2 cups
              oil in a wok and, before the oil gets too hot, put in the prawns
              pieces by piece.
 
        - 
        
        Fry until golden, take
              them out and drain.
 
        - 
        
        Leave about 1 tablespoon
              oil on the wok.
 
        - 
        
        Stir-fry the finely
              chopped onion and ginger root until their color changes.
 
        - 
        
        Then put inn the shrimp,
              stir and add sugar and continue stirring until all the sugar has
              dissolved.
 
        - 
        
        Add the remaining
              cornflour mixed with the chicken stock, blend well.
 
        - 
        
        Serve.