Finely chop onions and slit green chillies.
Add oil, turmeric, chilli powder and ginger garlic paste.
Mix all the ingredients nicely and adjust the salt as per your taste.
Clean and wash the fish pieces. If required, add little rock salt and curd to the fish pieces and wash.
Now take a wide vessel and spread the half of the onions mixture which was prepared in the step 3 in the vessel.
Now place the fish pieces on the onions and spread the remaining onions over the fish.
cover the vessel with a lid and cook for 3-4 minutes.
After 3-4mins, flip over the fish pieces and cook for another 2-3mins or till the fish is cooked properly.
Add coriander leaves and let it cook for a minute or more.
Fish curry is ready to serve. Serve hot with white rice.