Firstly cut the brinjals into + form and put them in salt water.
Dry roast peanuts, coconut, sesame seeds separately and allow it to cool.
In a pan, add onions, smear little oil and roast them for a minute.add garlic pods and fry it

Make a fine masala paste of all the roasted ingredients which are peanuts, and onion
In a cooking pot, add oil and heat it, add cumin seeds, mustard seeds and allow them to crackle.
add curry leaves.
Add the brinjals/eggplant/baingan and fry them well until the colour of the baingan changes.
Add the masala paste into it, mix well.

Add tomato purée
Add salt, red chilli powder, turmeric powder, coriander powder, mix well and cook the masala until oil appears at the corners.
Add the tamarind extracted pulp and stir well.
Add water if required and salt too.