Classic Ratatouille is a traditional French vegetable stew that is bursting with flavors. It is made with a combination of eggplant, zucchini, bell peppers, tomatoes, and onions. The vegetables are sautéed until tender and then simmered in a rich tomato sauce. This dish is perfect for showcasing the vibrant colors and flavors of summer vegetables. Serve it as a side dish or as a main course with crusty bread or over pasta.