Fry a cup of tomato paste in 3tbsp oil before adding 1 tsp each of garlic paste, salt, red-chili, turmeric, cumin & pepper pwds, a tbsp each of vinegar & coriander pwd, followed by bringing 2 cups coconut milk to boil in it, adding a sprig of curry leaves, a cup each of mango cubes & cleaned prawns and simmering till the prawns are cooked.
Phew!!! Go on now, have a go at this recipe while I catch my breath!
(PS. Alternatively, you can use cubed fish fillets or boneless chicken, instead of prawns.)