Vegetarian theme. In a meaty Mystery Box challenge, it was Claire who managed to impress the most and was given a significant advantage in the Invention Test, which would be contested in pairs. As well as picking the core ingredient, Claire was given the power to choose the pairs for the challenge. In a further twist, they would be cooking to impress six staunch meat-eaters, and the two judges, with their vegetarian meals. Aaron and Adam emerged as winners with their curry, and won the chance to face off in a mystery challenge for immunity.