Kalkandu Pongal is a special type of sweet Pongal made with rice, jaggery, and rock sugar candy (kalkandu). It is a traditional South Indian dessert often prepared during festivals and auspicious occasions. The rice and jaggery are cooked together until soft and then flavored with cardamom and ghee. The addition of rock sugar candy adds a unique crunch and sweetness to the dish, making it a delightful treat.