Sauce
Light Soy Sauce     3  tbsp
Pepper   a little
Salt     a little
Oil    3 tbsp

    
Steps
1)  Clean and wipe dry the prawns, cut into 2 halves (from head to tail)
2)  Put the prawn on the large dish in order, cut-side up, add a little salt
3)  Dust chopped garlic, grated ginger on the surface of prawns
4)  Using a big caldron (Chinese) or steam pot, with hot boiled water
5)  Steam the prawns for 8-10 minutes, add pepper and light soy sauce on dish
6)  Using another pan, heat the oil then pour over all the prawns
7)  Dust the chopped spring onion over the prawns, serve

Remark 
tbsp -     table spoon
If you like garlic, you can put more garlic on prawns
The picture shown above a little different from the real images, the prawns' cutting