Clean and de-vein the prawns, apply half teaspoon of salt and keep for 7-8 minutes, wash off the salt
Apply a little haldi powder to the prawns and keep aside
Heat oil in a non-stick deep pan, add the black cardamom, bay leaf, jeera, sauf and the chopped onions
Sauté till the onions turn golden brown, add the ginger-garlic paste, saute for some time and add the finely chopped or grated tomatoes
When the tomatoes turn pulpy add all the powdered masalas, sauté for about 2 minutes
Mix in the prawns and cook on a low flame for 4 minutes or so, add the chopped coriander and mint leaves, stir well, add some salt, mix
When the prawns are cooked and the gravy is semi-dry add the chopped green chili, mix, taste and adjust seasonings
Add a dash of lime