We eat a fair amount of oatmeal here. It's one of Chaos's favorite foods. That being said, I don't have time to make it very often. So, a bit of tweaking and I've discovered the easiest crockpot recipe.
1 cup of groats (steel cut oats, Scottish Oatmeal)
2 cups of liquid (milk, cream, water, apple juice, or any combination)
1 pinch of salt
Dump into a crock pot, and cook on low over night (or up to 8 hours).
If you're feeling adventurous, you can add in up to 3/4 cup of "mix-ins" such as dried fruit, fresh fruit (go for firmer fruits), nuts, your favorite granola, etc.
You can add your sweetener of choice when you dish it up in the morning, or if you're feeling lazy, add it in while cooking. I've also found you can add in a wee bit of vanilla, cinnamon, nutmeg, or any other flavoring agents you want.
I generally like mine scooped hot into a bowl with a dab of butter and a small pour of cream. Chaos loves his with fresh fruit, honey, and a dab of cream cheese.