1/2 lb prawns
4-6 garlic flakes
1 inch piece ginger
1 tsp mustard seeds
1 tsp cumin seeds
1 tsp red chilli powder
2 tbsp brown vinegar
Marinate prawns with above ingredients for 1 hour.
Heat little oil. Add the marinated prawns in it and stir it till prawns are well fried.
Then add puree of 3 tomatoes and cook it till tomatoes become tender.
Add two cups of water and cook it on low heat till prawns become tender and gravy becomes thick.
Method for Brown Vinegar
In 3 cups of water add 4 cloves, 1 inch piece of cinnamon and 3 big cardamoms.
Boil it for 20 minutes.
Turn off the fire and add 2 tbsp of white vinegar and 2 table spoons of caramel syrup (In a bowl add 2 tbsp of sugar and 2 tbsp of water. Keep it on stove without stirring. When sugar starts to burn add 2 tbsp of water).