Disclaimer.
I know this won't be for everyone. It depends on how much time you want to spend in the kitchen, how much you can do ahead of time and what foods you have to work with.
Just fun to think about ways to use leftovers for a hot/cold evening or Boxing Day buffet. When I say leftovers, it's by design. We know there won't be any naturally occurring leftovers unless we cook double the amount we need 😂
Inspired by the Yorkshire Pudding with Christmas Dinner debate on another thread. I had a random idea to make individual ''toads in the hole'' (or toad in the holes?) using the leftover pigs in blankets.
Some other ideas I had were,
-Mac n Cheese using colliflower cheese or the remains of the cheese board. You could add blue cheese for an extra zing.
-Veg quiche, anything you like in there really. Blind bake the pastry case in advance.
-Potato salad from the roasties.
-Turkey (or whatever your main roast was) and veg pie. Again blind bake the pastry case ahead.
-Fry stuffing patties to pop in buns with the sliced cold meats - turkey, ham etc.
-If you have alcohol and the right mixers, maybe a Christmas punch or cocktail.
This isn't a leftovers idea but I remember Delia Smith preparing trays of mince pies and freezing them raw. Stick them in the oven whenever you want them. Warm mince pies for dessert for not much effort on the day.