Heat oil in a pan.
Add cloves and cinnamon and stir.
Add ginger and garlic and fry well.
Add onion and saute until brown.
Lower the flame and add chilly powder, coriander powder, turmeric powder, sambar powder and salt.
Mix well with onion, garlic and ginger.
Add brinjals, tamarind extract and water.
Mix all ingredients well.
Cover and cook, till the brinjals are done.
When brinjals are cooked well, add cashew and coconut paste and mix well.
Set it to cook for about 5 mins, stirring occasionally.
Season with mustard seeds, curry leaves and dry chillies.
Garnish with coriander leaves.
:- After adding the cashew and coconut paste, if you feel that you need the dish more spicy, just dash 1 tsp of pepper powder - but allow it to get cooked well after that else the raw pepper smell/taste can spoil the dish.