Classic Ratatouille is a traditional French dish made with a combination of vegetables such as eggplant, zucchini, bell peppers, tomatoes, and onions. It is a hearty and flavorful dish that is perfect for a quick and healthy meal. The vegetables are sautéed until tender and then simmered in a rich tomato sauce. Serve it as a main course with crusty bread or as a side dish with grilled chicken or fish.