Duck legs are a good idea, as suggested, but you can also buy duck breast, which is quicker to cook and equally as delicious. I make a port and orange gravy to go with it, but you can skip the alcohol and just add cranberry sauce and a little water to the orange juice and zest, thickened with cornflour (plus a little dried ginger if you like a bit of a kick). Serve with veg of your choice.
Small Xmas puds are available, too, if you like them, but any pud or fruit would be as nice.
Better get the sprouts on now, as mentioned 😂.