Hey all,
I'm going to a casual party Friday night that's a bit of a potluck. I love to cook so I want to bring something, but I am really pressed for time.

My requirements:
1. Must use mostly pantry items (not much time to shop)
2. I have to make it during the day for a night-time party-- should keep well.
3. Also, I have to be able to transport it easily on (I'll be on the subway from Manhattan to Brooklyn).

Ideas? Thanks!