Definitely! Oatmeal is a very meal-prep friendly recipe, and refrigerates quite well. In fact, you can easily double or triple the quantity of your favourite oats recipe from this post, and your breakfast for the week will be sorted! I often make a big batch and store it in a airtight container for 3-4 days. When I'm ready to eat, I simply reheat it on the stove or in the microwave for a few minutes and my delicious breakfast is ready in no time.