100g butter, softened

 1 brown onion, finely chopped

 2 garlic cloves, crushed

 4 prosciutto slices, finely chopped

 2 cups (140g) sourdough breadcrumbs (made from day-old bread)

 1 Granny Smith apple, cored, finely chopped

 1/2 cup (50g) lightly toasted walnuts, coarsely chopped

 1/4 cup coarsely chopped tarragon

 1 1/2 tablespoon lemon zest

 4kg Coles Australian RSPCA approved fresh turkey

 2 cups (500ml) chicken stock

 Roasted potatoes, pumpkin and sweet potato, to serve

Apple cider gravy

 2 tablespoons plain flour

 1/2 cup (125ml) apple cider

 2 teaspoons Dijon mustard