To dream of oatmeal represents situations that make you feel down to earth or well grounded. Something that may appear in a dream when you feel humbled by something, face embarrassment, or feel a loss of power.
Negatively, oatmeal may reflect feelings of embarrassment or humiliation that you have lost power after first having more than other people. Feeling that your life has been downgraded. Feeling that forced to be nice to people after being so powerful that you never had to. Accepting a lower level of status after having a higher level.