Chettinad Masala Dosa is a popular South Indian dish that is loved for its crispy texture and flavorful filling. The dosa batter is made with a combination of rice and lentils, which is fermented overnight to give it a tangy and slightly sour taste. The dosa is then spread thin on a hot griddle and filled with a spicy potato masala. It is served with coconut chutney and sambar, making it a delicious and satisfying meal.