Every and all ingredient in this recipe template is optional and can be substituted… although if you change every one of them you’ll end up with something like curry at some point. Nothing wrong with that. Use your judgement!
You can make this with cooked rice or quinoa, however you’ll have to keep the mixture refrigerated the whole time. Eat within 3-4 days of cooking the rice or quinoa. If you have a dehydrator, you can dry your cooked rice or quinoa completely and use as “instant rice” or “instant quinoa” as you would the rolled oats.