It's the semi-finals. Two Michelin-starred Marcus Wareing, formidable chef Monica Galetti and MasterChef's seasoned diner Gregg Wallace step up the pressure in their search for a culinary talent exceptional enough to take the coveted title. After four weeks of fierce competition only the 12 best chefs remain, and the battle is on as they come together for the first time to cook off against each other. Their fate now rests in the hands of the infamous Invention Test. The 12 chefs have an abundant selection of meat and fish, fruit and vegetables and herbs and spices to choose from, but this time all the modern machines have been removed from the MasterChef kitchen.