Marinate the bhetki fillets with lemon juice, black pepper and salt, keep aside for 15 minutes or so.
Blitz the onion, garlic, ginger, green chilies and coriander leaves to a fine paste.
Smear the paste evenly on the fish fillets,. Keep aside for at least 3-4 hours, even better overnight.
Take flour in a flat dish. Roll the marinated fillets lightly on the flour and dust the excess gently. Keep aside.
Spread the bread crumbs on a flat plate (lets call it A). And the other half on another flat plate (lets call it B).
Add little salt and black pepper powder on the plate B. Give it a hearty mix.
Break the eggs in a big bowl, add a generous pinch of salt and pepper, whip well. Keep aside for 10-15minutes.
Take a bhetki fillet, dip in the whipped egg wash and now roll lightly in the breadcrumbs on Plate A. Take it out, shake off the extra breadcrumbs.
Again dip in the whipped egg wash and coat it with the breadcrumbs on Plate B. Press the crumbed fillet gently to ensure it is coated evenly on all sides. Press ligthly from all the side to straighten. Shake off any extra crumbs.
Repeat for the rest of the fillets.
Heat the oil in a deep frying pan, fry one by one till golden. Keep aside on a kitchen towel.
Serve hot with kasundi.