In our house, we have a pack (or sometimes 2) of M&S party food while we are sitting drinking wine and opening presents while the turkey cooks. (We get in the door from church/visits, turn on oven, light fire, throw in party food, shove butter up turkey's bum and clementine in her innards, cover in foil and throw in the oven - party food about ready to come out so wash hands, pour drinks, take off apron, sit and relax.....).
If we are visiting family, there are various:
Prawn cocktail
Smoked salmon
Vegetable and ham in creamy sauce vol au vent
Soup
Filo pastry "cracker" which included black pudding and not sure what else
Melon and parma ham fan
Pate and toast
Sometimes DM will do smoked salmon on a small salad, but change the salmon to parma ham or another suitable meat, or a sliced avocado, for those who don't eat salmon depending on who is there (within the extended family, we have 1 doesn't like fish, another can't do cured meats, another occasionally is a veggie and there are various other allergies and SN issues with tastes/textures to take into account...so she adapts as she goes).