Devon couple Jenni and Will are visited by Cornwall based Michelin star chef Paul Ainsworth, whose Mystery Ingredient is Cornish rib eye of beef on the bone. The pair are tasked with cooking the perfect steak for 11 guests, and have decided to serve it with pommes dauphinoise, bordelaise sauce and a roast tomato and courgette salad. They follow with a quintessentially English dessert of Eton Mess served with a basil macaron.