There are now just four of them left, and to secure a place in the semi-finals, two daunting challenges await them. First challenge is a dizzying challenge: to create a dish built around a single texture. Then the second challenge is a challenge that is as demanding as it is creative: elevating an everyday product that is all too often overlooked: stale bread. This task will require both inventiveness and technical skill to transform this symbol of anti-waste cooking into a true gourmet dish. Judging these creations will be four exceptional chefs: Marcel Ravin, Dimitri Droisneau, Alan Taudon and pastry chef Michael Bartocetti. The final challenge, which is an elimination round, is to create a gourmet dish using mackerel. At the end of the evening, one contestant will leave the competition and only three of them will continue their journey towards the title of Top Chef!