1. Pour the blended mixture of coconut and onions into a deep pan or kadai.
2. Stir in 1 cup of water and combine well.
3. Add the spices—chili powder, turmeric, and salt—and mix thoroughly.
4. Bring the mixture to a gentle boil.
5. Lower the heat and carefully add the marinated fish pieces.
6. Let it simmer for about 5 to 10 minutes, or until the fish is fully cooked and tender.
Pour a drizzle of coconut oil over the curry and switch off the heat right away.
Top it with torn curry leaves for added flavor. Serve hot with steamed rice or dosa.