This ratatouille tart is a beautiful and elegant dish that is perfect for entertaining. The tart crust is filled with a layer of sautéed ratatouille vegetables like eggplant, zucchini, bell peppers, and tomatoes, all cooked in a flavorful tomato sauce. The tart is then baked until the crust is golden and the vegetables are tender. Serve this ratatouille tart as an appetizer or a main course with a side salad. It's a show-stopping dish that will impress your guests.