Clean the prawns, and take out the veins. Wash properly, and marinate in vinegar for 1/2 an hr.So that the fishy smell goes away.After 30 minutes wash,and put salt and haldi into the prawn, keep aside.

Now make a fine paste with onions, garlic, ginger along with chillies. Keep aside. Again make a fine paste with mustard, poppy seeds. Keep aside.

Now take a wok,add mustard oil. Don't heat the oil too much. Now add whole garam masala and bay leaf. Fry for a minute. Now add the onion masala paste, with sugar,haldi and Kashmiri chilli powder. Fry properly till oil separates. Now add the mustard/poppy paste, again fry.If required add little water. Fry again, till oil separates.

Once all the masala has been cooked properly, add the prawns, one at a time. B careful it should not break. I do not fry the prawns, but it is optional. Add the seasoning. Now add the coconut milk, (no water anymore).Simmer the heat, and cook on low flame for 5 minutes.

Don't over cook the prawns, or they will become rubber like consistency. Check seasoning. It should have a thick gravy. Once perfectly cooked, serve with hot steamed rice.