Chestnut-Stuffed Mushrooms on Potato Rostis

For me, these say ‘Christmas on a plate’. They’re easy to make, beautiful to look at and delicious to eat, and particularly satisfying when you can forage in the countryside for some of the ingredients (the mushrooms and chestnuts – although they can also be easily found in the shops). The dish can be prepared in advance as far as the final heating, making it ideal for relaxed entertaining. Serve accompanied by a cooked leafy vegetable, a quick gravy and