Well, we don’t have a Thanksgiving in the UK, but turkey forms the main Christmas meal for most Britons.
In this household, there are two main “use ups”.
First is a simple turkey sandwich, which is guaranteed to appear for Boxing Day lunch. You need a reasonably good quality white bread. Supermarket “white sliced” isn’t good enough. But you don’t want anything too fancy. Butter it. Add turkey and any leftover stuffing. Add mango chutney. Eat
The other is based on a Delia Smith recipe from her 1990 Christmas book. Fry an onion and some mushrooms in butter, then add some flour. Add some turkey stock (or chicken) and stir till you’ve a thick sauce. Add parsley, cream and brandy and allow everything to cool. Then add turkey and ham (you could cook some bacon instead of the ham) Roll out a sheet of puff pastry to 30cm square and dollop the turkey mix into the centre. Moisten the edge of the pastry then bring opposite corners into the centre and pinch all the edges - so you’ve a square with the pinched edges in the shape of a cross. Bakes for about 30 minutes at 220.
If there’s still anything left, it goes into the freezer to reappear as a curry some weeks later. A fairly basic quick sauce that more usually appears with bean curry in this house - onion, garlic, coriander, cumin, fenugreek, garam masala, cayenne, tin of tomatoes. Sauce cooks down for 15 minutes or so, then the turkey goes in to warm through.