Chicken black curry

Trying to emulate a national dish of Sri Lanka we simply love. We bought a packet of roasted spices which has 8 different spices, roasted and grounded. Add to sauté onions, green chillies, curry leaves, grated ginger and garlic and viola it's done as a base paste. Add chicken, coconut milk, cayenne pepper and salt and leave to simmer for an hour. The whole house smells so good!