Here is the shiz. Before bed, take a paper towel and coat the inside of a crock pot with coconut oil (otherwise cleaning the crockpot will be no fun). Throw in 4 parts of water to 1 part steelcut oats, turn it on low, go to bed. Wake up, oatmeal ready to go.
And to make it a bit more interesting, I am rather fond of adding amaranth (1/4c if I use 1c of oats, the amaranth is 3:1 for water)(adds protein), sunflower seeds (also adds protein), coconut oil (medium chain fatty acids FTW), and chopping in almonds and walnuts. Oh, and a bit of cinnamon.
Takes a bit of planning, but it is super-easy, and in the morning all the meal prep I have to do in the morning is scoop oatmeal and add a bit of maple syrup.