1. Set the oven at 180oC
Prepare and cook the vegetables
2. Cut the cabbage into 1/4s lengthways leaving the stems on and blanch in hot water. Set aside.
3. Prepare the carrots and place into a saucepan with the double cream and cook gently until the carrots are soft.
4. Thinly slice the turnips and shallow fry in a little oil until golden brown. Set aside on some kitchen towel.
Seal the lamb
5. Heat the oil for the lamb in a frying pan and seal it all over. Season with salt and pepper and put into the oven but keep the frying pan.
Cook the potatoes
6. For the boxty combine the mashed potato and the grated potato, season with salt and pepper and pan fry in a ring mould until nicely coloured. Then put into the oven next to the lamb.
7. Cook the lamb in the oven for approx. 20 minutes and if using a probe thermometer cook it to 55oC. Allow to rest. It should be served pink.
Finish the vegetables
8. Remove the carrots from the cream and blend using a hand blender. Gradually pour in the cream while the blender is running to create a smooth puree. Season and keep warm.
9. Brush some oil over the cabbage and char grill or brown in a frying pan. Keep warm.
Make the sauce
10. To make the sauce place the rosemary in the pan that the lamb was sealed in, add the wine and reduce by half. Add the beef stock and reduce again to 200ml. Make a paste with the cornflour and a little cold water. Stir into the reduced stock and cook it out to thicken the sauce.
Assemble and serve
11. Slice the lamb into 3 nice slices, place some carrot puree on the plate and arrange the vegetables and boxty next to the lamb. Garnish with the turnips and dress with the hot sauce.