Enjoy the flavors of caramelized onions in this Onion Uttapam recipe made with a Thermomix. The batter is prepared by grinding rice and lentils, and then fermented to perfection using the Thermomix's precise temperature control. The Uttapam is cooked on a hot griddle, topped with a generous amount of sautéed onions, and cooked until golden brown. Serve it with coconut chutney or tomato chutney for a delightful breakfast or brunch option.