Tonight, it's the second quarter-final, and this week's four most talented cooks return to fight for a place in Knockout Week. Tonight, they face just one intense challenge. They must cook two courses that will excite not just John and Gregg but also some of MasterChef's most inspiring winners, finalists and contestants, who have all gone on to careers in the food industry.Tonight, their fate is in the hands of three MasterChef champions – Thomasina Miers (2005), Kenny Tutt (2018) and Saliha Mahmood-Ahmed (2017).With just two Knockout Week places up for grabs, these amateurs need to show real flair and ambition to edge closer to the MasterChef 2023 trophy.