Eloise Praino

A mystery box of Thai ingredients and only 75 minutes to cook has contestants stumped, as they try to gain a huge advantage for the upcoming invention test.

The contestants participate in a relay challenge after they are split into teams of four. Challengers each have 15 minutes to cook, and just 45 seconds to pass their dish on to their team-mate.

The top 24 face their first mystery box challenge. The bottom four cook off in an elimination challenge, resulting in one contestant being sent home.

Contestants from the blue team face an elimination round as they put their tastebuds to the test. In the second round, contestants must make an impressive dish in just 75 minutes to keep their spot in the competition.

Master of Middle Eastern cuisine, Yotam Ottolenghi challenge the contestants with his mystery box, giving them 75 minutes to create a dish that would earn them an advantage for the invention test.

The chefs must cook a tasty meal in under 75 minutes, to help save them from elimination. Meanwhile, Heston Blumenthal shares his recipe for a scrumptious barbecue leg of Mallee lamb.