Although it seems almost sinful to cook beautifully ripe tomatoes at the height of the summer, this dish intensifies the flavor of the tomatoes. A classic gratin is usually a dish of layered vegetables topped with cheese and buttery breadcrumbs. My version is a simple dish with large juicy tomato slices, a sprinkling of parmesan cheese, fresh herbs and a splash of balsamic vinegar. This dish is a perfect side for a hearty meal or a nice topping for a summer salad.
