Soak channa overnight and cook it with salt and pinch of turmeric pdr. Grind onion, tomato, green chilly and ¾th of coriander leaves into a fine paste. Grind 2 tbsp of cooked channa well and keep it aside.Heat oil in a pan and add cumin seeds. When it splutters, add grounded onion paste into it and mix well. When oil starts to separate and its void of the raw smell, add turmeric, garam masala and coriander pdr into it and saute it well. Put the cooked channa into it along with the water. Add the grounded channa into it and mix well. Boil it for few min. Finally add the chopped coriander leaves and remove it from fire.