Kvass starter? I typically just use yeast, old rye bread, raisins, and sugar. Maybe added lemon for taste at the end. This recipe is similar to how I make mine

Kvass starter? I typically just use yeast, old rye bread, raisins, and sugar. Maybe added lemon for taste at the end. This recipe is similar to how I make mine (in Russian): https://www.gastronom.ru/recipe/55100/domashnij-kvas-iz-hleba-bez-drozhzhej https://www.gastronom.ru/recipe/55100/domashnij-kvas-iz-hleb...