Eating custom in Hong Kong is similar with Canton.
As a food paradise in the world, there may be not a specified food for Hong Kong people to eat during the Christmas time. Most of families in Hong Kong may choose to eat in a famous local restaurant.
Besides the food mentioned above, Hong Kong people also prefer western cuisines such as French dishes, Italian dishes, etc...
Turkey is the traditional meat for Christmas dinner.
Chinese resturant
晚餐 - dinner 餐 - meal This is all in traditional Chinese! :)
Seafood
Yes, Goose is a traditional Christmas dinner bird, not as common a Turkey though.
Fried Chicken
Chinese duck. The neighbor's dogs ruined their turkey.
On Christmas day, they had Chinese turkey (duck).
The traditional food that is consumed during christmas is: the turkey dinner and mince pies.
Oslo, Norway
As in western culture, Christmas day was a time to spend with family. Judy recalls sitting down with relatives to a large meal on Christmas day, but it could be served at either lunch or dinner. Instead of turkey, her father would prepare foods such as roast barbecued pork, chicken, and soup with wood ears. Reminiscing, she says the meal had more in common with a Chinese New Year's banquet than a traditional Christmas dinner.
Portugal Christmas dinner party is celebrated at Christmas Eve not at Christmas Day.It is called Ceia de Natal which include Dinner, Late Supper and tables full of goodies (traditional sweets and cakes, etc) for the family party that goes as late as 3/4 am. Christmas gifts are opened at Christmas Eve as well at midnight.