Check Out The New Recipe From archanaskitchen.com . lunch is a traditional Chettinad dish which is commonly prepared in all households of Chettinad with brinjal and potatoes. Brinjals and potatoes are cubed and cooked with spices in a tamarind – tomato base. The addition of tamarind and tomato lends sour taste to the gravy and addition of spices lends a spicy taste. The combination of sour and spicy makes it as a perfect accompaniment for rice. The gravy lasts for a couple of days due to the addition of tamarind and sour.