Jamie Oliver served up tasty hasselback potatoes with walnuts, polenta and pigs-in-blankets on Jamie: Together At Christmas.

The ingredients are: 2 kg Maris Piper potatoes , (choose the smallest ones), olive oil and 4 large higher-welfare sausages, (400g total).
optional sausage stuffers: dates, dried cranberries, mustard, chilli, sage, cheese, pickled onions.
4 rashers of higher-welfare smoked streaky bacon.
optional: small sprigs of rosemary, 2 cloves of garlic, 1 tablespoon polenta and 4 shelled unsalted walnut halves.

See recipes by Jamie in his book titled: Together: Memorable Meals Made Easy available from Amazon now.