Use a variety of heirloom tomatoes to create a visual--and delicious--treat!
Preheat broiler. Heat a large skillet (preferably cast iron) over high heat until smoking. Drizzle peppers with oil; season with coarse salt. In batches, add peppers to pan and sear 3 minutes (do not stir). Stir, sear 3 minutes more, then transfer to a rimmed baking sheet.
Broil peppers, 7 to 8 inches from heat source, until charred and softened, about 5 minutes. Toss with vinegar and half the basil.
Arrange peppers on a platter; surround with tomatoes. Sprinkle tomatoes with coarse salt, drizzle with oil, then scatter remaining basil over platter. Just before serving, sprinkle with fleur de sel.