Book excerpt: In 2009, Paul, Stella and Mary McCartney launched the Meat Free Monday campaign as a simple and straightforward idea to show everyone the value of eating less meat - and to make it easier for us all to do so. The Meat Free Monday Cookbook is for everyone who shares the campaign's aims and consists of menus for each of the 52 weeks of the year - two main dishes, plus four other ideas for each meal of the day. Packed with recipes such as Spiced Pumpkin Pancakes, Roasted Halloumi Wrap, Pilau Rice with Cashews and Watermelon Granita, as well as vibrant spring soups, inventive summer salads, appetising autumn bakes and comforting winter stews, it includes contributions from Paul and Stella McCartney as well as from celebrity and chef supporters of the campaign such as Skye Gyngell, Giorgio Locatelli, Theo Randall, Yotam Ottolenghi, Bryn Williams, Twiggy and Vivienne Westwood.