As neither of my parents liked turkey, we always had roast goose with apple and prune stuffing, forcemeat stuffing, boiled potatoes and boiled red cabbage for Christmas dinner on Christmas Eve, followed by the Danish creamed rice dessert.
On Christmas Day we had roast duck(s) with the same vegetables and Christmas pudding with custard or cream afterwards.
At new year we went to family friends where we had roast turkey with absolutely everything, sage and onion stuffing, forcemeat stuffing, chestnut stuffing, bread sauce, chipolata sausages, gravy, boiled potatoes and roast potatoes and (oh dear) brussel sprouts. I always helped myself to as few as possible and ate them first as I loathe and destest them.
Christmas pudding and trifle for dessert.
Bashed neeps in Scotland were definately not Christmas fare, but for winter days when housekeeping money was short, and of course as the obligatory accompaniment to haggis on Burns' night. Fortunately, I like bashed neeps, as I do not like haggis.
I do understand why anyone would want any other vegetable than brussel sprouts. Since I grew up, I have never, ever eaten one.