"To ferment the grains" means to let the grains sit in a controlled environment where they undergo a natural process that converts sugars into alcohol or acid. Full definition
Our ancestors figured out how to make this mixture of fermented grains into bread and eventually how to save a portion of it to use it for later. (eatrealstaysane.com)
If grains are your personal norm and your baby's iron levels are good, mamas can choose to give their babies fermented grains before 12 months. (mamas.whole30.com)
Directions Add fermented grain, water and salt to a medium pot, bring to a boil and reduce to a simmer. (foodasmedicine.ca)