Heat a pan and pour coconut oil.
Splutter mustard seeds and saute crushed ginger and garlic.
Add the masala powders: kashmiri chilly powder, red chilly powder, coriander powder and turmeric powder. Saute well in low flame till the raw smell goes away.
Add the second coconut milk and boil.
When boiling starts, add the drained kera fish pieces.
Add required kudampuli and fenugreek seed powder.
Close with a lid and cook the fish pieces.
When the gravy has thickened a bit and the fish pieces are done, add the first thick coconut milk. Remove pan from flame before boiling starts.