This recipe is iffy because my crock pot cracked in the process; I figure it's best to find a new way to do it! The former recipe involved a water bath feature in which the oats/water were mixed in a bowl that was set into the crock. Water was poured around the bowl until it was level with the oats/water mixture. I'd done this recipe several times without incident, but this past weekend, there was a hairline crack in a perfect circle in the crock where my smaller bowl had rested.
Use a 2-quart crockpot by itself or rig up a roasting rack under your bowl.
The original recipe below in brief:
1.25 c. steel cut oats
5 c. water
Cook in a smaller bowl inside a bigger crockpot as long as it's resting on a wire rack of some sort. OR, cook same amount of water/oats in a 2-quart crockpot. Cook on low overnight (~8 hours).