1. Boil yam in water, peel the skin and keep aside.
2. Take a cooker, heat oil, then add onions, mint, green chillies and fry.
3. Add ginger garlic paste and mutton, fry for 3 min.
4. Add tomatoes mix well then add dry masalas, chilli powder, garam masala powder, turmeric powder and mix well.
5. Add yam and cook on low heat without the lid for 5 min.
6. Add chopped tomatoes, let it simmer for 5 min
7. Then add water, chopped coriander and salt and cook till the meat is tender.
8. Serve with plain hot rice.

Image: Flickr/creativecommons Chrysaora