It's been a long time since I last made hot cereal, but I think I remember making it work in the microwave by putting the microwave on very low power. If I remember right, I would heat it on high for X number of seconds, then switch to low for the rest of the time. Or something like that. It took some experimentation to get that to work, but at some point I had my routine down well enough that I could consistently make hot cereal that way.