Overview:Five amateur cooks battle against each other as the final week of heats begins. First, they must hold their nerve in the Invention Test, where they have just one hour to cook an exceptional dish from scratch. No-one goes home after this, because they must next survive the extremely tricky Palate Test, which sees chef John Torode demonstrate a beef stir-fry with choy sum and peanuts. Without seeing the demo, the amateurs are given just a few minutes to taste this dish before being asked to write down exactly what it is in it, using their sense of smell, and palate.