Classic Uttapam is a popular South Indian dish made with fermented rice and lentil batter. It is a thick pancake-like dish topped with a variety of vegetables like onions, tomatoes, and green chilies. The batter is made by soaking rice and lentils overnight, grinding them into a smooth paste, and fermenting it for a few hours. The Uttapam is then cooked on a hot griddle until golden brown and served hot with coconut chutney and sambar.