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. Uncomplicated yet utterly satisfying, this recipe is a testament to the simple pleasures of seasonal cooking at its best. So, gather your ripe tomatoes, embrace the earthy scents of the herbs, and let the flavors of parmesan cheese and tomatoes dance on your taste buds. This delightful culinary creation is a perfect side dish for a hearty meal or a great topping for a summer salad.