Ingredients
1 lb. shrimps, cleaned and de-viened
2 onions
Blend together to a smooth paste
1 small piece ginger
10 flakes garlic
3-4 black peppercorns
1 tsp cumin seeds
6 red chillies
1/2 tsp turmeric pwd
1/2 cup thick tamarind
juice or 2 tbsp vinegar
Salt to taste
Cooking oil

Method
Slice and fry the onions in the oil till done.
Add the ground masala and fry till the oil begins 
to seperate.
Now add the shrimps and salt and some water and simmer 
for a while.
Bring to a boil.
Add more vinegar if required and boil till done.
Eat with plain