Thanks for all the tips!
This morning, I measured out one cup of my organic rolled oats (ditto, Mrs Robinson!), put that in a bowl along with some dried blueberries, and added cold water until it covered up the oats. I put it in the microwave at full power for exactly 2 minutes, and stirred halfway through... and it didn't explode! So I don't quite know what I was doing wrong before but it worked great this morning, thanks! The rolled oats were cooked exactly to my liking, too - mushy with a little bit of texture left. I just added some milk and agave nectar after cooking and YUM!
(how excited am I that I rediscovered the big bag of HFCS-free dried blueberries my mom brought over last summer??)