firstly, heat oil in a pan and add mustard seeds and fenugreek seeds. let it crackle. and then add curry leaves, chopped shallots, garlic and fry till brown.
add the brinjal slit and fry for half a minute.
add turmeric powder, chilli powder, coriander powder and fry again until well combined.
now, add the tamarind water. soak the tamarind in water 15 minutes earlier and extract the water out of it. add salt, mix well , close and cook for 10-15 minutes or until the brinjal is soft and cooked.
open and add the fine coconut paste to it. mix well.
furthermore, add water to bring it to the consistency you require. goes in kashmiri chilli powder (optional) and mix well.
close and cook for 10 minutes again until the raw flavour of tamarind is gone and the colour of the curry changes to dark brown from yellow.
lastly, add jaggery to taste, mix well.
one last important step is, to drizzle some sesame oil on top the dish at the last to give out an awesome flavor in the curry.