The secret to this ingredients is getting good quality tamarind pulp. Which sadly, i dont have. I used tamarind paste
2 tbsp tamarind pulp mixed with 1/2 cup of warm water
2 to 3 tbsp sugar
1 tsp pepper
Take the juice of the tamarind water, remove the pulp and mix all ingredients and let it marinade for at least half an hour.
Use low heat and simmer prawn and marinade until the marinade thickens. Serve.