The main ingredient of traditional French ratatouille is vegetables, specifically eggplant, zucchini, bell peppers, tomatoes, onions, and garlic. Ratatouille is a Provençal dish that showcases these vegetables, which are often sautéed and then combined to create a flavorful and colorful medley. The dish is typically seasoned with herbs such as thyme and basil, and it is popular for its fresh and wholesome taste. Ratatouille can be served as a side dish or a main course and is often accompanied by crusty bread or rice. It emphasizes the use of seasonal produce and celebrates Mediterranean culinary traditions.