Smoked salmon on blinis always goes down well.
Peppadew peppers filled with cream cheese and chives or a mix of tuna, capers lemon juice and olive oil.
Smoked mackerel pate on mini oat cakes.
Quartered figs, blue cheese and prosciutto or salami on a skewer.
Tiger prawns with a Bloody Mary dipping sauce.
Endive leaves topped with blue cheese, chopped pear, sweet/salty almonds and a lemon dressing.
Baby gem leaves filled with prawns in Marie Rose sauce.
Smoked venison on a blini with a touch of lingonberry jelly.
Soup of choice served in shot glasses or espresso cups.
Devils on horseback.
Bagna cauda with a selection of baby veg/crudite for dipping.
Hopefully these suggestions will give you some food for thought.