Ctrl-F "popcorn"
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I'd have thought someone would've beaten me to the obvious reference.
Anyway, when it comes to microwave cooking, your best bet is probably your grocer's freezer. Stouffer's Lasagna Italiano is my personal favorite (even if it cooks better in a conventional oven.)
Get a toaster oven, however, and the world is your oyster---you can roast a chicken in one of those (I realize that your dorm forbids them, but you can hide it when the RA comes around, right?)