Take Onion Paste, Ginger-Garlic Paste, Tamarind Paste, Turmeric Powder, Red Chili Powder, Black Pepper Powder, Salt, All Purpose Flour and chopped Curry leaves and make a thick paste.
Rub this paste to the fishes and fill the slits with this mixture as well.
Marinate the fish for at least 2 hours in refrigerator.
Take fishes out of the refrigerator just before frying.
Now take a non-stick pan or Tawa and heat Oil on it and start shallow frying Pomfret fishes in medium flame.
Fry from one side for around 8-10 minutes or till that side is done completely and turned golden brown in colour. You can cover the pan with a lid after 5 minutes.
Flip the fish and they fry from the other side for 8-10 more minutes.