Add boiling water to stuffing mixture and stir, while this mixture cools and thickens chop the onion.

Sweat onions but don't brown then add to the bread mixture and stir

If using sausages score and remove the skin, pick the sage leaves and then chop.

Combine sage with stuffing mix, grate the apple and add that, mix

Add the sausage and mix followed by the chestnuts

Season with salt and pepper then form into a baking dish

Or you can form a large log shape on greased baking parchment and roll like a Christmas cracker then surround with a couple of layers of tin foil.

Form the log tight, garnish the top of the stuffing with some extra sage leaves or cranberries for example, drizzle with olive oil and bake at 190c for about 30 minutes. In the last image you can see the oven dish stuffing with a lovely golden crust

The log stuffing should be made a day or 2 ahead of time so that you can unwrap it when cold and carve, just make sure the slices are at least a couple of cm thickness

Arrange slices of stuffing on a baking tray and re-heat until nice and toasty, the 2nd image shows the sliced stuffing and the 3rd image shows the oven dish stuffing https://www.youtube.com/watch?v=tEHlNwpbZG4