Take a pan and fry all the above items and powder it dry. This is used for stuffing the brinjals. If remaining, can be used in the curry.
Cut the brinjals length wise with the base intact. Put them in water. Then fill the brinjals with the powder. Then fry it in a pan with enough oil until the brinjal turns color.
Take a kadai to add oil, mustards allow it to splutter. Then add onions and garlic and fry it well until translucent. Then add tomatoes and add coriander powder, chilli powder and turmeric powder and fry it.
Add tamarind water and allow it to boil after adding salt.