“Overnight” often means to get something in a hurry. But with oats, it means the opposite. Overnight oats are currently having a moment as a breakfast fad, but the dish is based on a very old concept: the fact that you can prepare grains by soaking rather than cooking them.
To make overnight oats, you add liquid like milk, yogurt, or water to some oats and wait until morning. By then, the oats will be as soft as if they were cooked on the stove top. It’s a great way to get your fiber without slowing down your morning or burning your tongue.