Mathi Masala / Sardines cooked in Masala

Ingredients needed for the recipe of Sardines Cooked in Masala:
1 kilo mathhi ( Sardines )
4 onions, sliced finely
15 green chillies, slit
2"piece ginger, julienned
4-5 pieces kudam puli, ( cocum), soaked in a1 cup of water
3 cups of coconut milk + 1/2 cup of first milk
1 1/2 tbsp coconut oil
1 tsp vinegar
salt to taste

How to prepare the Sardines Cooked in Masala?
Clean, wash and slash the Sardines / Mathhi fish.
Soak kudam puli in water and keep aside
Take 1st, 2nd and 3rd milk from the coconut. Keep the 1st milk (1/2 cup) separately and mix the other two ( 2nd and 3rd milk ) together. It should come to three cups.
Heat oil in a pan. Add the onions, ginger and green chillies and saute till they are golden in colour.
Add curry leaves, salt to taste and turmeric powder. Mix well.
Add the cleaned fish to the masala with the kudam puli pieces and water.
When they are mixed well,  add the 3 cups coconut milk and bring to boil.
Then simmer and cover till they are done.
Add the first milk and remove from fire and pour in the vinegar. Mix well.
Serve hot garnished with curry leaves.