Prepare the base:
In the same oil, add onions and fry until lightly brown. Add chopped carrot it is optional

Add ginger and garlic paste and sauté for 1–2 minutes. Add spices:
Add turmeric, (optional) red chilli powder and cumin powder.
Cook well, adding a little water so the spices do not burn.

Make the gravy:
Add water as required and salt to taste.
Once the gravy starts boiling, gently add the fried fish pieces. Final touch:
Cook for 5–7 minutes. Add green chillies and chopped coriander leaves.
Cover and cook for another 1–2 minutes.