I make this every day. I used to do it in a mini slow cooker with a timer, putting it on for an hour when I went to bed, then 3 hours before breakfast. Now I use the timer on the oven and cook it for 2 1/4 hours at 250 degrees. It's the perfect breakfast. Much cheaper than prepared cereals, full of fibre, healthy, filling and delicious. I often add fruit or nuts, dried cranberries etc. but after experimenting prefer to add them after it's cooked or they go soggy. Apples would probably be OK cooked in.