I make a courgette and coriander soup which can be served hot or cold.
Tomato or red salad (red onion, beetroot, orange pieces and radicchio or lollo rosso).
Rather than a quich Delia has a recipe for egg tarts, they are the same size and shape as a jam tart but with a mix of egg and herbs.
Filo parcels I put smoked salmon or mushrooms with cream cheese and bake in the oven for 10 - 15 mins.
Dried apricots soaked overnight fluff up to look a bit like egg yolks. Put some brie in the slit of the apricot, wrap a bit of streaky bacon round and bake for 10 - 15 mins.
Vol-o-vents are IMHO due a come back.
Mini 'kebabs' get a cocktail stick and thread on a square of melon, a mozzarella pearl and a bay leaf, or you could do min meatballs on cocktail sticks.
Cheese straws, get a ready rolled sheet of puff pastry, 'better' with Dijon mustard, score with a knife in to straws and then add a generous amount of grated parmesan. Bake for, you guessed it, 10-15 mins then break in to straws.
Slices of cucumber with cream cheese and smoked salmon or finely chopped ham.