Ratatouille is a basic vegetable dish from the southern region of France, particularly Nice. It contains eggplant, tomatoes, zucchini, onions, peppers and garlic. Each vegetable is first cooked on its own and then everything gets gently stewed together. Some elements can vary, including adding vegetables (such as mushrooms here) or various aromatic elements (such as olives). It is delicious on pizza.
