Rule 46: 
Always soak your oats
Discussion
Have you tried soaking in whey? I want to try that.
We typically add a little kefir and a little salt to the soak water
Does this result in better oatmeal? How long do you soak?
I soak mine overnight and it makes cook time faster.
It think itβs also supposed to boost nutrition.
I prefer the taste, it gets a tangy, sourdough-like flavor.
We generally soak around 3 cups of oats at least overnight and up to 3 days (I'm sure you could go longer) with a 1/2 tsp(ish) of salt, 1 Tbsp(ish) of kefir, and enough water to cover.
Soaking starts fermentation that neutralizes phytates that prevent digestion and bind to the calcium in oats so you can't assimilate it. The phytates are what give lots of people gas after they eat oats. Soaking also reduces cooking time somewhat for plain rolled oats, presumably for groats as well.
I see it for the first time
I just tried this with steel cut oats. I soaked for 2 days. They were very good. They had a bit of a sour taste like sourdough from the fermentation.