Caponata is a traditional Italian vegetarian dish from Sicily. It is made with eggplant, tomatoes, onions, celery, capers, olives, and vinegar. The vegetables are sautéed until tender and then simmered in a sweet and sour sauce. Caponata is often served as an appetizer or a side dish. The combination of the sweet and tangy flavors makes it a unique and delicious addition to any meal.