1. Clean and cut mutton in to 2.5 cm piece .
2. Grind together the spices ,cashewnuts and coconut .
3. Slice onion .Heat oil .Fry onion till crisp brown .
4. Add spices and fry for 2 to 3 minutes longer .
5. Add mutton .Fry for a further 5 minutes .Add salt .
6. Cover pan .Cook over a very slow fire .Keep a little water as desired ,a little time till meat is tender .
7. Add hot water as desired, a little at a time till meat is tender.
8. Add vinegar .Cheak for seasoning .Remove .