Oat groats are whole (dehusked), minimally processed oats. Because they have not been extensively processed, they retain a high nutritional value, and they can be used in a variety of ways. However, they also take a long time to prepare and cook, requiring hours of soaking and cooking before they are usable. Many markets carry oat groats, often in the cereal section or in the bulk area, if the market sells things in bulk.