Soak tamarind in warm water for 10 minutes & take the extract using 1.5 cups of water.Add all the spice powders given above & salt..Taste it and adjust as per ur need.Cut brinjal lengthwise into 4 pieces & keep them immersed in water to avoid color change.Chop onions and peel garlic.Set aside.
Now in a kadai , heat oil and temper all the ingredients given above in the same order.
Make sure to add all the ingredients after the mustard seeds splutter ..Saute everything in medium flame.
Then add onions , whole garlic cloves & curry leaves..Saute till it turns golden brown.
Add the brinjal pieces , saute for sometime & then add the tomato pieces.Saute till musy.
Now add the tamarind extract which we kept ready .
Add jaggery ,1/2 cup of water ,cover the kadai with a lid till brinjal gets cooked. Usually it takes 8-10 minutes. Keep the flame medium.
Then open the lid and check whether brinjal is completely cooked. Check for water. Add more water if necessary.
Allow the gravy to boil for 10 minutes to get thicken. Switch off the flame and transfer to a serving bowl.
Add a tbsp of gingely oil & raw curry leaves. Cover it with a lid..
Serve it after 30 minutes. Mix with plain rice ..Enjoy!