Ideas for amazing food to convert a bunch of omnivores?

[restingstate]

This week I will be giving a 15-minute presentation about vegetarianism to my English class on argument and persuasion. Obviously, I'm trying to persuade people to try vegetarianism (even though I'm vegan). I want to use food as a way to sort of prove my point. Give me your most convincing fingerfood ideas or recipes, please! I wanted to do mini cupcakes, but I have no experience with cupcakes and no time to experiment right now. I need tried-and-true recipes! Nothing too wierd/expensive/difficult/messy. Also, there are around 30 people in my class, so I need enough for everyone.

THANK YOU!!!