Since the 17th century Earl of Sandwich asked for a piece of meat between two slices of bread and called it a meal, its namesake has been the staple of easy lunches throughout the world. Its convenience, coupled with the sheer range of breads and fillings available nowadays, has established the humble sandwich as the central attraction of the school lunchbox.
Despite my best attempts at creativity and variety, however, my kids have reached sandwich saturation point. Bored of bread and fussy over fillings, they return from school with their barely-nibbled wraps and rolls squished apologetically into a corner of their lunchbox.