Sweet Potato Stackers and other Christmas nibbles. Cut sweet potatoes into 1cm discs, toss with oil and some seasoning on a baking sheet. Roast 20-30 mins at gas 6 until golden and crisp on the outside, then leave to cool. To serve, mix mayonnaise with lemon juice. Pile a scrunched up piece of prosciutto on each star, top with a blob of mayo. | Butcher, Baker
HASSELBACK POTATOES I think of these Swedish roast potatoes as being rather like sauteed potatoes on the stem: each one is cut into thin slices across almost right through, but not quite, and then roasted in buttery oil; as they cook, the potatoes fan out, like slightly fleshy crisps with their bottoms still attached.