Combine ginger garlic paste, lemon juice, salt, red chilli pwd, turmeric pwd, cumin pwd and coriander pwd in a flat dish. Apply this marinade lightly to the fish pieces and keep aside for 20-30 mts.
Heat oil in a non-stick pan, add few curry leaves, place the marinated fish and fry for 14-15 mts on low to medium flame.
Once its nicely browned, flip over gently to the other side and roast fish for another 10-12 mts till browned.