Heat oil in a pressure cooker. Add whole spices and roast until aromatic
Add in onions and saute until golden brown
Add ginger garlic paste, green chillies and saute until raw aroma goes away
Add mutton and saute until well browned
Add tomatoes and saute until tender
Add spice powders and mix well. Add potato and mix
Add little water and cook for 3 whistles. Lower heat and simmer for 5-6 minutes. Switch off
Once steam goes off, add corriander leaves and mix. Serve hot with roti/naan