Lightly roast the grated coconut and using a mortar and pestle create a paste.
In a bowl combine Ambulthiyal Paste and the pork. Mix well until evenly coated.
Heat oil in a pan and fry the onions.
Add the marinated pork and fry for 7 minutes.
Add the water and simmer for 15 minutes.
Add the coconut milk and mix through the roasted coconut paste.
Continue to simmer for 10 minutes or until most of the liquid has evaporated.
Serve sprinkled with extra roasted coconut.