Apply some oil on your hands and then peel the yam.
Now wash yam and make big slices of about 2.5 inches each.
Add the pieces in the pressure cooker and add a glass of water .
Pressure cook on on medium heat for 2- 3 whistles or cook till just done.
Drain the pieces and let them cool down completely.
Mash the yam pieces and add all the ingredients for making kofta in it and mix well.
Grease your palms and make round or oval shape koftas of medium size.
Heat oil in a deep pan and when it become hot add the koftas.
Now fry the koftas on medium heat till golden in colour ,drain and keep aside.
Gravy-pressure cook tomatoes and cashews for 3 whistles on medium heat,no need to add water.
Now puree the boiled tomato and cashews and make a smooth and fine paste.
Heat 2 tbsp of oil in a pan and add cumin seeds.
Then add cradamom,cinnamon and cloves and saute till cumin become golden.
Now add tomato puree,turmeric,chili powder and coriander powder.
Cook till oil start seperating from the masala.
Add 2 to 2.5 cup of water,kasoori methi ,jaggary and salt and simmer for 5-7 minutes.
Now add fried koftas and simmer for 5 minutes.
Garnish with fresh coriander and serve hot.
Serving suggestion- serve with cumin rice,pulao and parathas