Clean the fish and cut them into medium size pieces.
Marinate the fish with 1 tsp of red chilly powder, turmeric powder, black pepper powder and salt for an hour.
Shallow fry the fish, till it changes colour.
Heat up the remaining oil in the pan.
Saute onions, ginger, garlic, green chillies and curry leaves.
Add remaining 1/2 tsp of red chilly powder and fry for some more time.
Add tomato and continue to saute.
Once the tomatoes are cooked, add the fried fish and salt, if reqd.
Cook for about 5 mins.
:- Serve as a side dish for rice or rotis.