In a bowl, add yeast, sugar, psyllium husk, oil, and warm water.
Whisk until the psyllium husk and yeast have dissolved.
Let the mixture sit for 10 minutes to allow the yeast to activate. Once the yeast is foamy and bubbly, proceed.
Add the tapioca, potato starch, white rice, sorghum, and white bean flours to the bowl. No sifting is necessary.
Sprinkle the salt on top of the flour mixture.
Mix into the flour with a rubber spatula (or your mixer) until well combined. The mixture should resemble the texture of thick oatmeal.