You can do a shocking amount of stuff with a microwave. I posted a microwave sugar cookie recipe here somewhere... but that's not a particularly healthy meal.
Minute Rice cooks very easily (and quickly) in a microwave. I recommend getting a big box of it and cutting loose. Their website has a bunch of recipes, many of which are easily adapted to be microwave-friendly:
Minute Rice
If you're truly crammed for space in your kitchen and don't have space to store pans to go along with a hotplate, I recommend getting an electric skillet with a cover. They're incredibly versatile.
