Grilled summer vegetable salad

This is a North African classic that can be eaten hot or cold. Its wonderful smoky flavour is obtained from grilling the vegetables over a kanoun - a small charcoal fire. The Western alternative would be to barbecue the vegetables, or to put them on a grid over a gas flame or, more conventionally, under an oven grill. The idea is to scorch the skins black, so be fearless with the temperature. The preparation of this dish is fiddly but more than worth the effort for the unusually flav