Crush the jaggery and add the jaggery and coconut milk into a saucepan and bring to a boil. Keep stirring until all the jaggery dissolves.
Remove from fire and strain it into a pyrex dish. Meanwhile dissolve 3 tsp gelatin in 1/2 cup boiling water in a seperate cup.
Now add 1 tsp vanilla and unflavored gelatin into the pyrex dish with the jaggery mixture. Mix well and set in refrigerator and enjoy.
NOTE: This is an easy recipe to prepare and tastes like Watalappan.