This is, of course, a far cheffier way to eat tomatoes on bread than buying a loaf of white bread and making use of the Costco-sized jar of Hellman's in your fridge. But it's much more accessible to the home cook than it first appears. Fromager d'Affinois might not be stocked at your neighborhood grocer, but is available at many better cheese shops and online. (Of course, you can and should swap in Brie if that makes more sense for you; you'll still find yourself wondering when else you can swap out mayonnaise for a bloomy-rind cheese.) It tastes just as good if you slice the toast into, uh, normal slices instead of wrangling foot-long planks, some of which will inevitably be too thin or too thick. Past those two bits, all you need are some very good late-summer tomatoes, a bit of good olive oil, and a pinch of flaky salt. It'll take you 15 minutes to make. It'll be even quicker when you inevitably decide to make a few more. As always, it is a good idea to buy more cheese than you think you need.