1. Heat the oil in a wok and fry the onions till golden.
2. Add the tomatoes, stir well.
3. Add all the spices and cook over low heat for five minutes.
4. Add the chicken and cook till browned all over.
5. Add the yogurt and stir.
6. Cover the pan with a lid or foil,and cook for 15 minutes.
7. Add the lemon juice, green chillies and coriander leaves.
8. Serve with plain boiled rice.