recipe/idea request: "green fuzzy food"

[cellio]

There is a Halloween pot-luck at work on Monday. Just yesterday we had a spectacular fridge purge -- things years past their expiration dates and quite a few "science experiments" and containers of green fuzzy...something. These ideas seem like they should go together. What can I make for Monday that would evoke the themes of the fridge purge?

Constraints:
- I'll need to keep it at room temperature for a few hours. Or if it's small I can use the fridge. :-)
- Cannot require that-day heating.
- Kosher parve or dairy (no meat).

I will unlock this post Monday after work if I get any suggestions.

Thanks!

Comments

[dsrtao]

Guacamole is appropriately green, and can probably be induced to look fuzzy-ish with the aid of a fork.