Former banker Irini Tzortzoglou entered Masterchef “out of boredom” after retiring. She had first learned to cook in Crete, where she was born. Not wanting to embarrass herself on television, she trained for a year, not just by mugging up on what was happening in Michelin starred Greek restaurants but physically – to make sure she could cope with running around kitchens during the competition. Since winning in 2019 she has immersed herself in Greek food and has written a cookery book, Under the Olive Tree. An inspiration for over-60s, she talks to Emine Saner in the Guardian.