Transfer the oat mixture to several jars. Since this recipe makes two servings, Brooks uses two medium-sized jars, but feel free to distribute the mixture into whatever size and amount of jars you have on hand. You can also simply transfer the oats to a Tupperware container as long as it has an airtight lid.
No matter which container your oats are in, open the lid and place the oats in the refrigerator. The ideal time frame is overnight, but it should be refrigerated for at least 6 hours.