The quarter-final chefs are challenged to create something special from a table of citrus, herbs and spices, with only the four most impressive going through the next round. This sees them given 75 minutes to cook a main course and a dessert for restaurant critics William Sitwell, Tracey MacLeod and Jay Rayner. However, judges Marcus Wareing and Monica Galetti will be the ones to decide who wins a place in knockout week.