We love a good heirloom tomato salad as much as anyone, but it’s nice to remember the magic that a few breadcrumbs and some grated cheese can bring to these sweet summer fruits.
Preheat broiler. Line a rimmed sheet pan with aluminum foil, shiny side up, and set an oven rack to the top position. Arrange tomato halves in pan. In a small bowl, stir together remaining ingredients. Sprinkle mixture over tomatoes, then transfer to top shelf of oven and broil until nicely browned, 3 to 5 minutes.