Turkey sandwiches can get a little repetitive after boxing day so this twist on a cottage pie is a great way to use up the leftovers in one quick go that can even be frozen and saved for later.
You need to get a little creative, review what leftovers you have and swap and change as you see fit. A mix of mince, turkey, stuffing and pigs in blankets works great if you haven't already finished them all.
Any leftover veg can be mixed in to replace the listed ingredients and leftover mash will save having to make any more.