I did a search and I didn't see anything like this on Chowhound so I thought I would share. We just came back from vacation, and one of the places we stayed served "Summer Oatmeal" for breakfast. It was a cold oatmeal and was really very good. We have been making it since we got home and love it.
1/3 Rolled Oats (not steel cut, not minute)
Mix and refrigerate overnight or longer.
We find 1/3 cup of each is a good breakfast serving. But you can make a cup of each and have several days worth and it still tastes fine when you eat it later. I also add some chia and flax in when I mix it, a pinch of salt and a bit of honey or brown sugar. We eat it with chopped nuts and fruit mixed in but I add that at the table.
*Don't use Greek Yogurt. It comes out with the consistency of spackle.You have to add a lot more milk. :)