1) Remove heads and peel shells from king prawns but leave tail sections on.

2) Place prawns in a mari-bag and add Major Thai Mari Base.

3) Massage and place in refrigerator for a minimum of 2 hours.

4) Peel and dice the flesh of the mangoes and tip into a bowl.

5) Add remaining salsa ingredients and mix well.

6) Place in refrigerator for two hours so the flavours infuse.

7) Heat a lightly oiled griddle and when very hot cook prawns for 45 seconds on each side until they turn from grey-blue to pink.

8) Serve hot with salsa.