Grill the peppers over charcoal, directly over a gas flame, or under a conventional grill. Place them in a plastic bag to sweat for 2 minutes, then peel off the skin under a running cold tap. Halve the peppers, remove the stem, seeds and pith, and cut into thick slices. Cut the peaches into similar-sized slices and add them to the peppers. Mix the dressing, season it to tas