Grind together coriander powder, chilly powder, turmeric powder, pepper powder, cinnamom pieces, cloves and cardamom pods to a fine paste.
Heat oil in a pan.
SautT onions and add ginger, garlic and green chillies.
Add ground masala followed by duck pieces, vinegar and salt.
Stir in the thin coconut milk.
Cover the pan with a deep lid containing water.
Add the potatoes when the meat is almost done.
When the potatoes are cooked, add thick coconut milk and remove from fire.
Heat oil and ghee in a pan.
Add mustard seeds and when they crackle, add onions and curry leaves.
Pour this into the duck curry.
:- Serve Duck Curry hot.
:- Enjoy the Duck Curry.