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, making it even more delicious. The process of making Onion Uttapam is similar to that of Classic Uttapam. The fermented batter is spread on a hot griddle, and 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 often served with coconut chutney and tomato chutney.