Soak black chickpeas overnight. Wash and drain.
In a pressure cooker, add the chickpeas with sufficient water, 1/4 tsp turmeric powder and salt and cook till done.
Meanwhile, grind the roasted coconut to a very smooth paste adding little water.
In a "chatti" (earthern pot), heat coconut oil. Add the shallots and saute for a couple of minutes.
Add the tomato and cook till all mashed.
Add in the remaining turmeric, coriander and red chilli powders and cook for a couple of minutes.
Add the cooked chickpeas along with its water and the roasted coconut paste. Simmer for 10-15 minutes, stirring occassionally till the flavors are settled. Switch off.
Heat oil in a small frying pan, sizzle the mustard seeds. Fry the curry leaves and dry chillies and add into the prepared curry.
Serve hot with rice, puttu or dosa.