Onion Uttapam is a variation of the classic Uttapam where finely chopped onions are added to the batter. The onions add a sweet and tangy flavor to the dish. The batter is prepared in the same way as the classic Uttapam, but before spreading it on the griddle, a generous amount of onions are sprinkled on top. The Uttapam is then cooked until the onions turn golden brown and crispy. Onion Uttapam is usually served with coconut chutney and tomato chutney. It is a popular street food in South India and makes for a delicious and filling meal.