Super easy = buy things like:
Falafal
Tasty marinated olives
Dip selection w breadsticks and veg sticks
Indian snack selection - onion bahji, veggie pakora, veggie samosa etc
Veggie spring rolls
Spread black olive tapanade over crostini
Quite easy
Mini tartlets (Jus Roll is vegan and you could do some kind of mushroom tpping, or black olive tapenade with tomato or roasted red pepper or something)
Filo pastry money parcels with roasted veg, or mushrooms, or sweet potato and spinach (+ pine nuts are delish but you said you don’t want nuts)
Marinated and baked tofu on cocktail sticks (or you could use the taifun olive flavoured tofu, the would be lush on a cocktail stick with cherry tomatoes a big juicy olive and a basil leaf. I would probably fry that to make is extra tasty)
Mini polenta circles with caramelised balsamic onions
Caponata on crostini/sough dough/whatever
Some kind of ‘roll up’ like this one veganinthefreezer.com/spicy-tortilla-rollups/#_a5y_p=3014475
A savory breakfast cake like this (but leave out the goats cheese obvs) www.thekitchn.com/recipe-zucchini-and-olive-brea-122288
Sweet potato wedges/normal potato wedges