Soak chick peas overnight.
Cook it in a pressure cooker for 10 mins and set aside.
Dissolve jaggery in tamarind juice and strain. Leave aside.
Grind together onion, ginger and garlic to a fine paste.
Heat 2 tbsp of oil in a pan or a kadai.
Fry onions in it.
Add the ground onion paste followed by the spices, salt and yoghurt and fry, till the gravy thickens.
Put it in a serving dish and decorate with onions and lime slices, potatoes, tomatoes, chillies, mint leaves and coriander leaves.
:- Serve with bread or paratha.