due to its glutinous texture, gluey lumpishness, hint of slime,
and unsual willingness to disintigrate, oatmeal should
not be eaten alone...*
*secrets of how the "Ode to a Nightingale" was written are also revealed
For hot breakfast cereals, we would have oatmeal or Cream of Wheat (which is a brand name). We wouldn't call it porridge.
In the South, they also have grits, made from corn(maize).
If I had to refer to them in the general, I would say "hot cereal."