Wash and drain the chicken pieces. Rub with the turmeric and red chilli powder along with salt. Reserve till the time of cooking.
In a saucepan, heat oil. Saute the ginger garlic paste for a minute.
Add the onion and green chillies and saute till just wilted.
Add in the curry powder and fry for a minute.
Add the marinated chicken and toss well.
Add the tomato, sufficient water - around 3/4 cup. Season well. Cook closed till chicken is done, stirring in between. You could do this process in the pressure cooker as well.
Once done, sprinkle in the garam masala. Serve hot garnished with coriander leaves.