1 Shell and devein prawns, reserving heads and shells.

2 Peel and devein the prawns the tails intact.

3 Shell prawns, devein and rub with salt to remove slime, rinse and pat dry.

4 Peel the shrimps except the tails, devein and clean. Mix in the marinade and set aside for about 30 minutes.

5 Rinse the prawns thoroughly, devein, wipe to dry, set aside.

6 Devein and rub the prawns with salt and cornflour . Rinse well, pat to dry and then mash.

7 Shell and devein prawns, reserving heads and shells. Heat oil in a saucepan and fry heads and shells until they turn pink.

8 Devein and rub the prawns with salt and cornstarch. Rinse well, pat to dry and then mash...

9 Soak the dried big chilies overnight. The next day, drain the chilies. Peel and devein the prawns, leaving the tail on, in reserve. Set the shells and heads aside.