Sugar puffs,weetabix or coco pops, depending on what kind of morning im having.
Although a special mention must go to sugar puffs coz me mate ate sugar puffs and nothing else for two weeks and lost just over 2 stone. "the sugar puff diet,it works,it really works". he did however say his piss smelt of sugar puffs, as did his farts,his belches and his sweat.