Jewish Corn Rye Bread Recipe - A request for help
I am new to the forum and am eager to learn more about baking these wonderful breads. I would like to start with the Jewish Corn Rye Bread recipe but do not know that it means to "Ripen 80% rye sour until pungent" as per the instructions. Please pardon my ignorance here but I'm more experienced with cake baking and cooking.
Thank you for any help that can be offered here.