We have steel-cut oats most mornings, and my routine is to bring it to a boil, then cover, turn it off and let it sit until we're ready for breakfast-- at least 20 minutes though. Then I add whatever fruit and nuts I want and reheat.
I was just wondering.. any reason I can't do this the night before and just leave it on the stove, then reheat in the morning with the fruit and nuts? I'm just thinking of food safety. Would I need to simmer it for a particular length of time do you think?