Cut the fish fillet into pieces.
Cut the raw mango into medium-sized pieces.
Chop ginger, Serrano pepper/green chillies.
Add chopped ginger, sliced shallots, serrano pepper pieces, ground turmeric, cayenne pepper, Paprika, ground coriander, ground black pepper, 5-6 curry leaves, and salt into the pan & crush them all together with 2 teaspoon coconut oil.
Add the chopped mango pieces to the crushed spices along with some water and bring to a boil.
Add the fish pieces and a little water (about ½ cup). cover and cook the fish pieces.
Once the fish pieces are cooked well and most of the water has evaporated, add coconut milk. Remove from the heat. Drizzle a teaspoon of coconut oil and garnish with curry leaves.
Serve hot with steamed or boiled rice.