Cut brinjals in 4 upto one inch of the stem leaving the stem intact.
Heat oil in a kadai(wok).
Splutter mustard, pepper and curry leaves.
Add the sliced onion and the brinjals and fry till the onions are brown and the brinjals discoloured.
Add ground Masala 1, tomatoes and ginger-garlic paste and fry till the raw smell disappears and the whole is well blended which would take 5 mins.
Pour a cup of water, add the ground Masala 2, tamarind extract, salt to taste, jaggery and the required amount of water to make a thick gravy.
Allow the curry to simmer till the brinjals become soft and cooked.
Garnish with coriander leaves.
:- Serve with biriyani.