But since I didn’t, here’s the official word:
When preparing Quaker Oatmeal in the microwave, we recommend using a bowl with sides that slant outwards, such as a pasta or soup bowl. This will prevent the steam that develops when cooking the oatmeal from pushing it up and over the edge of the bowl.
Anyone got a bowl with sides that slant inwards? I see a Questionable Experiment suggesting itself.