Add milk to mutton liver and keep it for 15 minutes to remove impurities, any bad smell and to tenderize the liver.
Heat a pan and add mutton liver, turmeric powder and chilly powder. Do not add salt, it will rubberize the liver. Mix well and add water. Let it cook for 5 minutes in medium heat. It shouldn't be cooked more than 5 minutes. Liver needs only 5 minutes to cook. Let the water evaporate (around 80%). Needs little gravy. Keep it aside.
For Frying:
Heat a pan and add 1 tablespoon of coconut oil and and add shallots and fry until translucent.
Add ginger, garlic, green chillies and fry for few minutes until the raw smell of garlic goes away.
Add coriander powder, garam masala, pepper powder, salt and saute nicely for few minutes.
Add the cooked mutton liver with gravy to it, mix well and fry for some time around 5 minutes.
For Garnishing:
Add half teaspoon of coconut oil, curry leaves, garam masala, pepper powder and fry for few minutes in low heat until the color of liver changes. Serve Kerala Mutton Liver Fry With Pepper hot with rice or porotta.