Heat oil in a kadai, add mustard and jeera seeds, let them splutter.
Add chopped onions, curry leaves.
When onions turn transparent, add chopped tomatoes and cook until soft.
Add all the spice powders chilli, turmeric and coriander one by one.
Mix well and add chopped Brinjal pieces.
Add quarter cup of water to cook the brinjals. after around 5 minutes when the vegetable is three fourth done add the tamarind extracted water, mix well with the vegetable.
Add the boiled kidney beans / Rajma and required salt for the gravy.
Mix everything together and close with the lid for five more minutes.
Now at the ground coconut fried gram paste into the masala.
Add required water to make the gravy and to semi thick consistency. The gravy tends to get thick and while cooling down hence add enough water while boiling the coconut paste.
After around 5 to 7 minutes all the froth is settled and at this time switch off.
Serve hot with rice and papad.