Chicken liver pate is easy and best done in advance.
Frozen chicken livers from a supermarket
Butter
onion
seasoning
optional extras
brandy
garlic
fresh/dried herbs
peel the onion and fry in butter, add the defrosted livers and fry in LOADS of butter
Add the other ingredients and cook until the livers are cooked through
Put in a blender and then pour the gloop (looks awful at this stage) into a bowl or individual ramekins, top with a little melted butter.
Fil parcels filled with cream cheese and whatever they will eat (I'd normally use salmon trimmings) mushrooms work well - make sure you cook them before putting in the pastry.
Or filo parcels made with a piece of brie and a dollop of mango chutney.
If you wanted to do a couple of tapas type things
dried apricots, soaked overnight, fill with cream cheese or brie or a pitted olive, wrap in streaky bacon, use a cocktail stick to secure and cook for 10 mins.
Asparagus wrapped in Serrano a ham, just 'butter' the ham with dijon mustard first.
cheese straws - pack of puff pastry, I use ready rolled.
score into stirp about 1.5 cm wide - you don't need to go all the way through. spread a fine layer of dijon mustard and then scatter grated Parmesan cheese all over, bake for 10 mins, when cool enough to handle brak across the scoring into straws.