The seven best home cooks from this week's first round 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 2022.Tonight, the contestants face two challenges that are designed to gauge both their creativity and culinary repertoire. The first is the Market Challenge, where the seven must invent a dish on the spot for judges John and Gregg from a market full of ingredients including chicken thighs, rack of venison and whole John Dory. The pressure is on to impress because at the end of this test one contestant will be sent home.The remaining six then take on their most demanding assignment so far: cooking a dish to a brief set by one of the country's toughest food critics, Jay Rayner. Jay has asked them to cook a dish with one of the most versatile ingredients in the world, rice. Whether it be used in a savoury or sweet dish, it must be the star ingredient, not just an accompaniment.Just two places are up for grabs in this week's quarter-final, so the dishes must be flawless.