Kumbakonam Thanjavur Kadappa is a popular South Indian side dish made with potatoes, moong dal, and a flavorful coconut-based gravy. It is a creamy and mildly spiced dish that pairs well with dosa, idli, or rice. The potatoes and moong dal are cooked until soft and then simmered in a coconut and spice paste to create a delicious and comforting dish.