Clean, wash and drain green chana. Heat oil. Add chopped onions, sauté till light brown. Add ginger paste and garlic paste. Stir and add chopped tomatoes.
Cook for some time. Add red chilli powder, cumin powder, chaat masala and chana. Add little water if required and cook till chana is soft. Add whisked yogurt, chopped coriander leaves and salt and cook for few more minutes.