Make a smooth paste of black sesame seeds and black peppercorn with very little water. Keep aside.
Heat oil in a pan. When smoking hot, throw in the ginger, garlic and onions, saute till the onion is a gorgeous golden brown.
Now add the chicken, turmeric powder, cumin powder and green chilies, cook over a medium flame for 5-7 odd minutes.
Add ½ cup warm water, continue to cook over a medium flame till the chicken is about to 75% cooked, 10-12 mins I would say.
Add the black sesame and peppercorn paste, give it all a hearty mix. Splash a little water if it is becoming a bit too dry.
Cook till the chicken is tender, another 5 minutes or so.
Adjust seasonings. Serve hot with rice.