I am glad to see oat foods taking new forms and gaining popularity with new audiences. I welcome all enthusiasts sharing what they have learned.
But you have to acknowledge the existing traditions and their expertise. It would be a tragedy, if, instead of seeds of civilization, you were spreading some meaningless imitations that have no roots. Your post has many layers of sophistication, but I believe you have omitted the true kernel of the matter.
I don't know what guava tastes like, but I strongly suspect it does not belong in an authentic oatmeal porridge. The canonical additions are apple or apple jam with cinnamon, or blueberry. It is ok to experiment (e.g. bananas and coconut are great with blueberries), but some things just don't belong there. Cherries (too astringent) and cloudberries come to mind. But I will not judge your condiments until I have tried them out.
As other commenters have noted, it is not absolutely necessary to sweat the cooking. In Spartan conditions rolled oats can be eaten straight with some fluid, though you need to be aware it is going to swell in the stomach. A traditional way to cook unrolled oats is to put them overnight in oven. With rolled and steamed oats I use microwave on full power until the porridge almost boils over, about 3 minutes. It's not as good as long simmered porridge (the gel is thinner and not as creamy), but it's fast and good enough. If I get rich I will definitely get an inverter microwave, I did not know they existed.
Whole grain oat is said to moderate blood sugar spikes in comparison to other cereals. That suggests it contains higher amounts of anti-feedants or mildly poisonous substances. This is nothing to be alarmed about, it's a very common theme with "healthy" plant foods. It could be the fiber that slows the digestion, too.
Some people claim to have a problem with the slimy consistency of the porridge or gruel. I have met people who said they hated it since they were small children. I don't believe anyone really is so impaired: they were probably just finding more rationalizations for some anti-breakfast meme diet.
In Finland we have a style of flat 100% oat bread that is very succulent and so slick and chunky it won't stick to teeth nearly as much as other breads. I believe it is some kind of baked aerated porridge.
Inspired by all the blog posts I've seen promoting unusual diets, nootropic drugs, unusual sleep cycles, and so on, I've decided to make my own post suggesting some radical lifestyle choice.
My suggestion here is, as the title says: you should probably eat oatmeal sometimes. Yes, I know, oats are <2% of global grain production, so this is a pretty crazy-sounding idea, but bear with me. Eating oatmeal sometimes will literally change your life.*
*slightly
oatmeal vs rice
White rice is one of the most popular foods in the world.
Compared to white rice:
about whole-wheat flour
Whole-grain wheat flour goes rancid much faster than white flour.
Wikipedia, quoting a 2004 book, says:
(The "germ" is the part of the seed that actually grows into a new plant. As you'd expect, it's the part with the most protein and vitamins.)
Hmm. If that's the problem, why do (unground) wheat berries last for 10+ years, longer than white flour? Does the bran protect stuff from oxygen? I don't think so, it's not metal foil, it has some gas permeability.
Maybe there's a correction of Wikipedia from some reliable source, like Wikipedia. Here's a post from a food testing company that says:
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Ah yes, enzymes. When wheat berries are ground to flour, the enzymes start doing things and the flour goes rancid, but if you remove stuff to make white flour, you remove most of the enzymes.
As for oatmeal, rolled oats have such enzymes activated, so they must be treated with steam. Oats have the germ in the bottom, and can be cut up more easily than wheat without triggering enzymes too much, but steamed rolled oats still last longer than unsteamed steel-cut oats. It's similar to how cutting onions releases alliinase but if you microwave the onion first it deactivates most of that.
Also, I think the rancidity-relevant enzymes in oatmeal might have lower thermal stability than the ones in wheat. But it's still possible to steam-treat whole wheat so that whole wheat flour lasts longer. I think people have relatively recently found that you want to use superheated steam for that. Maybe whole wheat flour treated with superheated steam will be a thing in the future.
oatmeal is versatile
Oatmeal works with a variety of different flavors, and other ingredients can often simply be added to it before or after cooking.
There are several options for the liquid used, including:
There are also many reasonable options for additional flavors, including:
Flavor combinations I've used for oatmeal include:
Oatmeal also has several options for textures:
why isn't oatmeal more popular?
Most people's experience with oatmeal has been from one of:
These days, you can get "quick-cooking steel-cut oatmeal". That's a relatively recent development, using the cutting-edge technology of, uh, cutting the oatmeal into smaller pieces. "Cutting edge", get it?
Also, thanks to advancements in microwave technology, cooking steel-cut oatmeal in a microwave has become more practical, but most people don't know how to do it.
how to microwave oatmeal
Oatmeal in a microwave needs to be cooked close to the point where it boils over. So, you want an "inverter microwave", one that can vary current instead of pulsing the magnetron every few seconds. Because of semiconductor progress, those are now common.
You also want an electronic scale. Measuring cups are an inferior approach to cooking.
Now then, put a bowl on your scale and add:
To cook it:
If you add hot liquid (such as hot tea) instead of cold liquid, then the initial full-power microwaving should be shorter or skipped. Soaking oatmeal for a while before cooking also reduces cooking time.
If you do things right, you can fix a bowl of steel-cut oatmeal and not need to wash anything besides a bowl and a spoon, which is the theoretical minimum amount of dishwashing.