Heat oil in a Kadai, add mustard seeds then add onion and add ginger&garlic paste saute them for few mins till raw smell goes
Add tomato fry till oil separates
Then add the grinded masala powder to it and add little water and boil them for 3-4mins
Add prawns and fry till oil separates
Finally garnish with coriander & curry leaves
Chettinad prawn fry is ready to serve with rice, chapati and naan.