There isn't a dull mouthful here, thanks to the mixture of punchy flavours You can use coriander instead of mint, or black olives instead of green ones Credit : Haarala Hamilton and Valerie Berry Diana Henry The Telegraph's award-winning cookery writer Diana Henry is the Telegraph’s much-loved cookery writer. She shares recipes each week, for everything from speedy family dinners to special menus that friends will remember for months. She is also a regular broadcaster on BBC Radio 4, and her journalism and recipe books, including Simple and How to Eat a Peach, are multi-award-winning. A mother of two sons, Diana can satisfy even the fussiest of eaters.    See more Published 21 May 2026 9:32am BST This is deceptively simple. In addition to the potato you only have to cook the feta and do some quick-pickled slices of onion.…