Mince pie tiffin

Roughly chop the mince pies into bitesized pieces. Toast the nuts in a frying pan, then roughly chop if using. Melt together the chocolate, unsalted butter and a good pinch of salt until smooth, then add the chopped nuts and mince pies; stir to distribute. Tip into a baking-parchment-lined 20cm square tin and level the top. Allow to cool to room temperature, then transfer to the fridge to set, before cutting into 16 squares.