Tomato Uttapam is a flavorful and tangy variation of the traditional Uttapam. It is made by adding a generous amount of finely chopped tomatoes, onions, and green chilies to the fermented rice and lentil batter. The batter is made by soaking rice and lentils overnight, grinding them into a smooth paste, and then fermenting it for a few hours. The fermented batter is then spread on a hot griddle and topped with the tomato-onion mixture. Cook until the Uttapam is crispy and golden brown. Serve this delicious Tomato Uttapam with coconut chutney or mint chutney for a burst of flavors.