Heat oil in a non sticky pan.
SautT ginger pieces and when it turns slight brown, add garlic pods and continue to sautT.
Add onions followed by tomato and green chillies and saute.
When tomato begin to dissolve,
add pepper, turmeric powder, tamarind, chilly powder and salt.
Continue to sautT and add the spice powders.
Take it out from the pan and grind it in a mixer thoroughly.
Heat up the same pan.
Add little oil in it.
Add the chicken pieces.
Add one spoon of vinegar and cook it for 5 mins in the pan.
Add the ground ingredients.
Add one glass of warm water and close the pan and cook it until the gravy gets thick.
:- Serve hot.