Melt the butter in a small saucepan, stir in the flour and cook for a few minutes.
Slowly add the stock stirring all the time, until you have a smooth sauce. Turn the heat right down and add the cream and Stilton, stir until the cheese has melted and season to taste.
Bring a large pan of water to the boil, salt well, add the pasta and cook according to the packet instructions
Fry the bacon in the oil for a few minutes, add the sprout and turkey and cook until they start to brown.
Once the pasta is cooked, drain and add to the turkey mixture. Pour over the sauce and mix well.
Transfer the pasta mixture into an oven proof dish, and top with the cheddar, extra Stilton and breadcrumbs.
Bake in a hot oven for about 5 minutes until golden and bubbling.