Kaalan
Kaalan is a Keralite dish from Southern India, made of yogurt, coconut and a vegetable like nendran or a tuber like the yam.
It is very thick, which distinguishes it from a similar curry known as pulisheri, and sourer than avial. For the same reason, the kaalan can last longer when stored. In many preparations, more pepper and/or chillies are added to make the kaalan spicy, in addition to its signature sour taste.
Kaalan is typically served as part of the sadhya.
