If you dream of eating gruel, it may indicate significant changes in your life. This symbolizes potential travel, your attitude towards self-restraint, and morality. If you feel liberated while eating gruel, it could signify a release from stress or reaching a higher status in life. Additionally, there may be a possibility of recovering lost possessions.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Gruel" (page 195) â resolved via the equivalent "Porridge" entry.
In a dream, porridge means travel by land, abstinence, piety and fear of wrongdoing. Eating porridge in a dream means release from prison, attaining a high ranking position, finding a lost property, or having excellent religious standing. Porridge is mostly made from flour and milk. The flour comes out of grinding. The milk emanates from the udders of an animal and the porridge is cooked on fire, thus all three can be interpreted according to their individual meaning. Eating porridge in a dream during the summertime means stress, adversities, trouble and a fight. (Also see Breakfast food)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.