Preheat the oven to gas 6, 200ºC, fan 180ºC. Remove the skins from the sausages and put the sausage meat in a large bowl with all the other ingredients except the streaky bacon.
Season and, using your hands, work it all together until well mixed and evenly distributed.
Form the mixture into 16 short sausage shapes and wrap each one, with a sprig of rosemary, in a piece of streaky bacon. Place on a baking sheet and cook for 30 minutes with the other vegetables while the turkey is resting.
See more Christmas recipes
For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home.