Onion Uttapam is a variation of the classic Uttapam, where finely chopped onions are added to the batter before cooking. The onions add a sweet and tangy flavor to the dish. To make Onion Uttapam, the batter is prepared by grinding soaked rice and lentils, and then mixed with chopped onions, green chilies, coriander leaves, and salt. The batter is spread on a hot griddle and cooked until golden brown. Onion Uttapam is usually served with coconut chutney and tomato chutney. It is a popular breakfast option in South India and is also enjoyed as a snack or light meal.