Heat butter and oil. Add mutton boiled fry for 5 mints with ginger garlic paste, add salt cover and cook for 10 mints.
Add crushed black pepper, red pepper, coriander crushed cover and cook.
Then add yogurt and 2 tbsp butter in the end.
Lastly add Ginger julienne, Coriander leaves, Green chilies, all spice and cook covered till oil comes on the top.
Serve it with Naan.