Curtis Stone sets tonight's mystery box which is all about the humble potato. Contestants are vying for a place in the Semi-Final by creating a sweet or savoury dish featuring delicious spuds.

Contestants must hero a fruit or a vegetable in their dish. If they select a fruit they need to produce a savoury dish and if they select a vegetable they need to create a sweet dish.

In tonight's pressure test contestants must recreate Kirsten Tibballs lemon meringue tart. The top three dishes will send their mini-makers into the Grand Finale, the others will be hearding home.