Buttermilk Kuzhambu or mor Kuzhambu is commonly prepared in South India. This is a liquid curry recipe which is served with white or boiled rice, pancake made of lentils / mixed gram dosa.
Traditionally, it includes vegetables like okra, winter melon or ash gourd, colocasia, etc. The taste is a bit sour, and it is a dish of the South Indian states like Andhra, Tamil Nadu. It is widely prepared on festivals as a special dish. It is often served with hot steamed rice and potato fries.
This is very rich in calcium and Vitamin C. Has very low cholesterol.
References
Mor Kuzhambu Wikipedia(Text) CC BY-SA