Eric Treuille is director of the Books For Cooks cooking school in Notting Hill. He is the author of Bread, Pasta, Canapes, The Organic Cookbook and Le Cordon Bleu's Complete Guide to Cooking Techniques. Find out more at www.booksforcooks.com. Birgit Erath owns a busy spice store in Notting Hill. She travels regularly in search of new sources for herbs and spices and recipes for seasonings. Find out more at www.thespiceshop.co.uk.