Horsemeat in burgers was hard to swallow, but there are far more sinister culinary crimes afoot...Chicken eggs that haven't come from chickens, melamine in infants' milk in China, nut shells in spices – these are just some examples of the food fraud that has occurred in recent years. As our urban lifestyle takes us further and further away from our food sources, there are increasing opportunities for dishonesty, duplicity and profit-making short-cuts.Food a...