Choose good aubergines all of the same size and shape, very fresh, glossy and a deep violet colour. Wipe them clean, cut off the ends and then, with a long knife, make four deep lengthwise cuts in each. Put them on a dish and sprinkle lightly with salt and freshly-ground pepper. Leave for about 15 minutes.
Cut the tomatoes in half. Slice them 1 cm (½ in) thick,