"Over seasoning and under-seasoning are typical mistakes when making sausage at home," Shoults says ... then combine well per the recipe.
To make the sausage rolls, heat the sunflower oil ... salt and sage and mix well. (Check the seasoning by frying a small amount of the mixture until cooked through. Taste and adjust as necessary.) ...
Add the celery, apples, garlic, and poultry seasoning, and cook for 3 to 5 minutes, stirring often. Add the apple-vegetable mixture to the bowl of sausage, along with the bread; mix well.