Eggplant and Tomato Gratin is a delicious and healthy side dish that is perfect for a summer barbecue or picnic. It is made by layering eggplant and tomato slices with breadcrumbs, Parmesan cheese, and herbs, then baking until golden brown. The result is a flavorful and colorful dish that is perfect served warm or at room temperature. To make it even more special, try using a blend of different cheeses for the topping, or adding some chopped olives or capers for extra flavor.