In a pan heat butter and oil, add garlic and saute for a min then add spring onion and cook to get translucent...

Now add chkn,salt,black pepper,white pepper and cook until chkn is half done..

Now add yogurt,lemon and lemon pwdr and cook on medium flame... when oil seperates and chkn is done add green chillies and turn off flame...

Garnish with ginger,lemon slices and coriander leaves...