Roast the peppers on an open flame using your gas hob or bbq or place them in an oiled oven tray and roast them until black on the outside for about 20 minutes. Then strip off the skins, remove the seeds and stem. Try to do this while they are hot, it's easier to remove the skin.
Blend the flesh with the rest of the ingredients, adjusting to your taste. Serve cold with garnish and flat bread.