Wash the Mutton Liver Well. Add Mutton Liver, salt, turmeric powder in a pressure cooker with required water and cook for 3 whistles in medium flame. Allow the cooker to release the pressure on its own.
Heat Coconut oil in a Wok, Add Mustard and allow to splutter.
Add Chopped onion and fry till glossy texture.
Add Curry Leaves and saute them.
Now add the cooked Liver pieces, Pepper powder, salt and roast until the mixture blends well.
Serve them hot.
Notes
Do not cook liver for more time or it might become hard.
I have added limited pepper powder your can increase/decrease the spice level as per your taste requirements.