It's not exactly what you could call fast food. In fact, it took years of effort. Food researchers pored over some 4,000 health claims used by manufacturers and supermarkets to tempt shoppers into buying their products. These were whittled down to only 222 that were judged to have basis in scientific fact and from those they have concocted a menu that is being hailed as the healthiest ever. It includes a series of superfoods that can provide you not only with a filling main meal but also plenty of extra snacks and treats with equal health- promoting benefits.