Hi Firecrest, this is my plan for xmas day dinner........
Bring the Venison to room temperature for 10 minutes before popping it in the oven. The crunchy golden potatoes were invented by the Hasselbacken Restaurant in Stockholm, Sweden and are an excellent alternative to roast potatoes.
Preheat the oven to 200C/400F/Gas Mark 6. Rub the fillet all over with the olive oil, then season with salt and freshly ground black pepper. For a very neat presentation, tie the Venison up along its length at 4cm intervals with fine string. This will firm it up and give it a good round shape.
Place a peeled potato in the bowl of a wooden spoon and make vertical slices, 2 - 3mm apart, about 3/4 of the way through each potato. The wooden spoon will stop the knife cutting all the way through. Place the potatoes in a buttered baking dish, cuts uppermost. Melt half of the butter and pour it over the potatoes, then sprinkle with salt.
Heat a heavy roasting pan or very large frying pan until very hot indeed and add the fillet. Brown this quickly and evenly all the way round. Season again and place the Venison and potatoes in the oven. Roast the Venison for 20 minutes for RARE or 25 - 30 minutes for MEDIUM. Bake the potatoes for 30 minutes, now and then basting the with melted butter. After 30 minutes, sprinkle the breadcrumbs and grated cheese (optional) over the potatoes.
When the Venison is cooked to your liking, remove it from the oven and transfer to a warm serving plate to relax for about 10 minutes. While you make a gravy, finish cooking the potatoes for another 15 minutes until golden and crisp.
Put the roasting pan over the heat, sprinkle with a tbsp. of flour and cook for a minute until brown. Deglaze the pan with a glass of red wine or port, scraping up the bits sticking to the bottom of the pan (at this stage you could add a couple of dried mushrooms for extra flavour). Whisk in the game or beef stock, season well and bring to the boil. Simmer for 10 minutes until syrupy. Strain into a gravy boat.
Slice the Venison and lay on a bed of thinly shredded radicchio, and serve with the wine gravy and Hasselback potatoes.
Mark