I was allowed instant oats from purée (traditional oats, so more coarse than the instant, were allowed a couple of months later). I made them with more milk than they advise (extra protein) & ate them hot. Of course it took two or three days to eat a recommended serve of the oats in the beginning and I’d just reheat them & add a little more milk the next days. After a month or so on traditional oats I’d add blueberries. Besides vegetables & fruit, the oats were the other carb I ate but only three or four times a week.
Now I add two big spoons of yoghurt, a spoon of mixed seeds, a scoop of collagen (vital proteins dissolves really well), cranberries & blueberries. Still made with lots of milk and still eaten hot. Only use about 1/2 - 2/3 of the recommended serve of the raw oats. I always have leftovers but I eat them for an afternoon snack.