Overview: Ainsley Harriott prepares dishes inspired by school dinners, including shepherd's pie with minted peas, mac and cheese with bacon and leeks, and jam and coconut sponge with custard. He is joined by guests Kimberly Wyatt, who whips up a cheese and bean tortilla, and Juliet Sear, who puts her own spin on a classic school dessert with her cornflake tart.