I make a festive couscous, soak couscous in veg stock (eg marigold) along with zest of an orange and lemon. Add chopped pistachios, dried cranberries or pomegranate seeds. Make a dressing with the orange and lemon juice a little honey and olive oil, and pour over, mix with a fork allow to cool and add fresh chopped parsley. You can also add chopped chilli and crushed garlic if you like a bit of spice. Finely chopped peppers and red onion are also nice in it. Its a great easy side dish instead of rice salad as there is no faff of cooking, draining and cooling the rice. One 500g bag of couscous makes mountains.
Winterslaw is also nice, grate or finely shred (think food processor or mandolin) apple, carrot, celeriac, celery, red onion and red cabbage and dress with a dressing made from half mayo half natural yogurt, dijon mustard, honey and lemon juice.
Homemade sausage rolls beat bought ones hands down, use ready made all butter puff pastry and spread either cranberry sauce, favourite chutney or grated cheese and wholegrain mustard on it before using good quality chipolatas, skinned, roll up sealing with beaten egg, cut to desired size glaze and bake, on a tray lined with parchment, in a hot oven for about half an hour. Be warned these are very moreish and will need hiding if cooked in advance, perhaps make keep in the fridge to bake on the day, lovely warm.
Chicken liver pate is simple too.
Hope these ideas help.