This week's seven best home cooks from the first rounds return to test their culinary wits and try to prove to judges John Torode and Gregg Wallace that they have the potential to be MasterChef Champion 2023.

Tonight, the contestants face two more challenges designed to gauge both their creativity and culinary repertoire. The first is their most difficult test so far – cooking a dish to a brief set by one of the country's toughest food critics, Leyla Kazim. Leyla has asked them to put their finest plates forward, cooking a dish that showcases sourness or bitterness.

The pressure is on to impress, because at the end of this test only the best cooks will remain in the competition.

Then, the remaining cooks face one more challenge to earn a place in this week's quarter-final – by cooking a dish celebrating stuffings and fillings. With just four places up for grabs, who can handle the pressure and show they have what it takes to progress further in the competition?

It's the fourth week of heats, and the judges are mixing it up once again. They have a set of challenges the contestants must complete in order to progress in the competition.

Nine home cooks arrive with both their dreams and ingredients ready for their first test, the Audition Round. This year's auditionees come from all over the UK - cooking a range of dishes that not only aim to challenge the palettes of the judges, but to make their tastebuds dance. Cooking their Family Favourite dish and making it MasterChef worthy, the hopefuls must show John and Gregg who they are as a cook and how good they could become. John and Gregg don't witness them cook in the MasterChef kitchen. Instead, they taste each dish in the Tasting Room. Just like diners in a restaurant, they judge each contestant's food solely on the plate that is put in front of them.

After tasting all nine plates, John and Gregg pick their three favourite dishes, giving those cooks a well-earned MasterChef apron and immunity from cooking in the next round. However, for the remaining six contestants, the competition is not over. Faced with an invention test, they must pull out all the stops to cook a dish – sweet or savoury – good enough to get them into the competition, and this time, John and Gregg are in the kitchen witnessing their every move. The pressure is intense, and the stakes are high, as at the end, only four cooks can join the three already fast-tracked in the next round of challenges. For two, their MasterChef dream is over.