In a bowl put fillet pieces add salt, peppers powder, ginger and garlic paste and mix well let it marinate for three hours.
Pour fillet pieces on a tray and spread them, sprinkle cornflour generously. Toss the other side and sprinkle more cornflour till all pcs are covered well.
In a nonstick pan add little oil and fry fillet pieces in batches, till nicely browned up.
Remove in a plate and keep aside.