Yotam Ottolenghi is the restaurateur and chef-patron of the seven Ottolenghi delis, as well as the NOPI and ROVI restaurants. He is the author of eight bestselling and multi-award-winning cookery books. Yotam has been a weekly columnist for the Saturday Guardian for over thirteen years and is a regular contributor to the New York Times. His championing of vegetables, as well as ingredients once seen as 'exotic', has led to what some call 'The Ottolenghi effect'. This is shorthand for the creation of a meal which is full of colour, flavour, bounty and sunshine. Yotam lives in London with his family. www.ottolenghi.co.uk @Ottolenghi

Helen Goh was born in Malaysia and migrated with her family to Australia at the age of ten. After studying psychology, she combined psychotherapy practice with a cooking career, becoming head pasty chef at a landmark Melbourne restaurant before moving to London, and joining Ottolenghi. Co-author with Yotam, of the best-selling baking book Sweet, she has worked closely with him in recipe development for over 10 years, drawing widely on Asian, Western and Middle Eastern influences in her cooking. Helen is also a successful food columnist whose recipes appear in the Sydney Morning Herald, Guardian and Observer. She lives in London with her husband and two sons. @helen_goh_bakes