Food / Hello! Need help with a Polish recipe (quick, and easy to prepare) [8]

My college age daughter was given an assignment due Wednesday, right in the middle of finals week. Her professor assigned students to bring in a homemade food item related to their heritiage for all to share after the final. Very nice idea, just not well thought out. The majority of the kids live in the dorms with no access to a stove or oven, and just a very tiny fridge. So....she is driving 2 hrs home to make the food item and immediately turn around to drive 2 hours back...In between studying and taking finals in her other 4 classes. We are polish which is why I am asking here!

So, this is what we need, any help would be greatly appreciated.
A recipe that can be made quickly (she has about 4 hours at home)
A simple recipe for a kid who can barely boil water
Very basic ingredients
A recipe that once made won't need refridgeration before being served the next day
or any heating prior to serving.
Feed 30
Be something pople will want to eat at 9:30 -10 in the morning.
OH, and its worth 20% of her grade!

Soo... that isn't too difficult a task!! Anyone up for he challenge?

I thought... cookies or no knead bread she could take in jelly with? But I have no idea? Thank you!!