Armed with whatever cooking equipment they own, high school sweethearts Fiona and Jeremy will be dishing up the queen of comfort food Nigella Lawson's speckled brown butter colcannon; The Living Room's Miguel Maestre's caramelle with pesto alla Genovese; Poh Ling Yeow's braided beef curry puffs; and internet renegade Matty Matheson's sticky toffee pudding.