Use cucumber slices as a base and add cherry tomatoes and a basil leaf, secure with a cocktail stick.
Chilled courgette and coriander soup in shot glasses.
Dried apricots soaked overnight give you a nice egg yolk sized space to stuff (normally I'd stuff with brie and wrap in bacon) you could add finely chopped veg, spring onion and capers might work and then bake for 10 mins.
Is this for Xmas?
Cut the top off a cherry tomato, add some vegan mozzerella and put the top back on to make a sort of mini santa - you can do the same with strawberries but I believe strawberries to be evil so they don't enter my house.
Cut a slice of water mellon into squares and add things on to a cocktail stick before putting it on the watermelon.
Individual gem lettuce leaves with a couple of sliced grapes and a drop of home made salad dressing.
Thinly slice courgettes, add a filling and roll up, secure with a cocktail stick, I'd normally do a mushroom stuffing but you obviously need an alternative.
Chats - deep fried baby potatoes.
Mashed potato rolled into balls, bread crumbed and deep fried
Rice balls
Mini fruit kebabs - cocktail sticks with a grape, a slice of banana, a slice of melon - you get the idea.
If you have some of those canape dishes, spoons, tiny pots you could do a tray bake of small pieces of onion and sliced peppers, put in a bowl with spices and olive oil to coat them first, then tray bake and put on tiny dishes with tiny fork.