Keep
fish whole and cut diamond shape incisions on both sides.
Marinate fish in soya sauce, salt and chilli powder for at
least two hours, turning it every 15 minutes.
Heat
enough oil in wide frying pan or wok to deep fry fish. When
oil is hot, fry fish on one side until crisp and repeat for
the other side.
Drain
off excess oil on slotted spoon and serve on a flat dish
with lemon slices.