This ratatouille quiche is a savory and satisfying dish that is perfect for brunch or a light lunch. The quiche 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 quiche is then baked until the crust is golden and the filling is set. Serve this ratatouille quiche with a side salad for a complete and delicious meal. It's a versatile dish that can be enjoyed warm or at room temperature.