This the usual way how we prepare this dish. I'll post another version of this recipe soon.
Ingredients:
Coriander seeds - 1.5 tsps
Mustard seeds - 1/4 tsp
Cumin seeds - 1/4 tsps
Tamarind - very small piece
Onion - 1/2
Garlic - 2 pearls
Coconut (grated) - 1/2 cup
Tomato - 1/2
Salt for taste
Oil - 1-2 tsps
Curry leaves(minced) - 5-6
Coriander - 5-6 leaves
Coriander - 5-6 leaves
Procedure:
Heat oil in a pan. Add red chillies, coriander seeds, mustard, and cumin seeds. Saute until you get the aroma; do not burn the ingredients. Chop onion and garlic. Meanwhile, soak tamarind in water (6-8 tsps of water).
Grind all these sauteed ingredients along with chopped onions, garlic, and turmeric powder. Add 2 teaspoons of grated coconut and grind. Add tamarind puree as you grind. Let the mixture be coarse.
Heat oil in a pan, add minced curry leaves. Saute for 2 minutes, add ground mixture. Add 1.5 cups of water, and salt. After you take off the ground mixture, add remaining grated coconut and grind for 2 minutes. Add this to the boiling mixture. Close the lid and let it boil. When the mixture starts boiling, add chopped tomatoes. Mash the tomatoes. Add prawns and coriander leaves. Let it cook. Put off the flame when all the water is drained.
You can view another version of this recipe in here: http://katmandige.blogspot.in/2011/10/etti-prawn-sukka.html