Heat oil in a pan and temper with cumin seeds. Saute for a few seconds. Then add the onion, ginger and garlic. Fry till light brown. Add the chicken, coriander stem, turmeric powder and garam masala powder. Fry for 2-3 minutes on a medium flame. Add the chopped greens and roasted gram flour. Mix everything well and saute for a minute. Keep aside to cool down.