Udupi idli jar is a popular South Indian breakfast dish made with fermented rice and lentil batter. It is soft, fluffy, and served with a delicious carrot chutney. The idli jar is a convenient way to store and transport idlis, making it perfect for picnics or lunchboxes. The carrot chutney adds a tangy and slightly sweet flavor to the idlis, making it a delightful combination.