Here's the recipe for overnight hot cereal in a slowcooker:
Butter the inside crock of your slowcooker and add an amount of dry cereal grains consistent with the number of servings that you wish to prepare (check the label). Whatever that amount is, triple it in liquid (can be all water, all milk or water/milk combination) and add that to the dry cereal, stir to mix. Put on the lid and set your slowcooker to WARM (or your lowest setting).
Believe me, I know precisely where that setting is now; I've woken up... to "warm"!
Life is Good!