Grind the
chilies, turmeric, cumin seeds, garlic, mustard
seeds and onions to a paste then mix in the prawns.
Heat the ghee and fry the prawn mixture for 2
minutes.
Add the
water, curry leaves and salt
and bring to the boil. Simmer for about 10 minutes
until the gravy is thick. Stir In the lemon juice
and serve hot with rice or chapattis.