best to make one bowl at a time, using no more than 1/3 cup uncooked oats
The oatmeal will bubble up as it microwaves, and if your bowl is too small, the cereal can spill over the sides before it is done. Stopping in the middle of microwaving to stir helps prevent this.
cooking time depends on the power of your microwave. In general, it should be done in 1 ½ to 2 ½ minutes. The oatmeal is ready when almost all of the water is absorbed. If you overcook it, just stir in a tablespoon or so more water
And we've all heard about the cholesterol-lowering bonus.