Can you substitute steel cut oats for the rolled oats? And can flax seeds be added and eaten raw

So you know though, the human body can’t break down flax seeds. To get their benefits, flax seeds must be consumed in ground form. Look for flax seed meal and add to foods such as hot cereals, granola or anywhere you might add wheat germ.

You can use steel cut oats, but you should pre-cook them as in this recipe. https://food52.com/recipes/3077-overnight-miso-porridge. Yes, you can add flax seeds, and you can eat them raw.