Add crushed black pepper, ginger garlic paste, cornflour and salt to taste to the chicken pieces.
Mix well and marinate for 15 minutes.
Heat oil and shallow fry the chicken from both the sides until golden and crisp. Keep the flame medium high.
Remove from oil and keep aside.
Turn down the heat and in the same oil add butter and let it melt.
Add finely chopped garlic and saute for 6-7 seconds.
Add green chillies and saute lightly.
Add corn flour and roast for 3-4 minutes on low flame until the raw smell is gone.
Add water gradually and keep stirring to avoid lumps.
Bring to boil and add lemon juice.
Now add the fried chicken pieces to the butter garlic sauce.
Add crushed black pepper and mix well.
Cook on medium high flame, stirring continuously until the chicken pieces are evenly coated with the sauce.
Turn off the flame and garnish with fresh coriander.
Serve hot as a appetizer or snack.