Atash, if you soak the whole grains for 24 hours first, then grind them and add the other ingredients, that eliminates the phytic acid issue. There are tons of websites with recipes about that.
It isn't the yeast that breaks down the anti-nutrients and enzyme inhibitors, it is the warm and moist conditions. Remember, the grains are designed to sprout when wet and warm, and to defend themselves against digestion in the mean time. (Which is why some people soak until at least the point of sprouting, to ensure all the phytates are gone.)
Look up Sue Gregg's blender batter for pancakes. It is the most well-known recipe.
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Opsec, most of my gluten-free friends use a blend of flours, usually aiming for a neutral flavor and texture. Each has tweaked based on their family's preferences and so they are all different. And they all use some sort of gum to make up for the lack of gluten.
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BTW, Atash, have you ever heard of Crispy Nuts? Since nuts have phytates too, many of my friends soak them for 24 hours, then dry them back out in a low oven. Makes them crispy. But remember, once you eliminate the phytates, they are susceptible, and shouldn't be stored for any length of time.
The real key to phytate-free eating is planning your meals ahead, so you can put grains and seeds and nuts to soak the day before. If you need a grain you haven't pre-soaked, you are better off using refined versions for that meal and do better with your planning next time.
Phytate-free eating also means storing your grains in whole form, and grinding the soaked grains just before use. Which means you need the right grinding equipment that can handle something moist. But it also eliminates the concern about the natural grain oils becoming rancid while flours and meals sit in storage.
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Right now I am taking a bit of a vacation from worrying about maximizing nutritional health. But when I start up again, I plan to work my meals around small quantities of rare-cooked grass-fed meats, large quantities of pasture raised eggs, large quantities of grass-fed home-fermented dairy, large quantities of home-fermented veggies and salsas and chutneys, and a moderate amount of soaked grain and nut products. I think this diet would function best for us in terms of macronutrients and micronutrients.