Other ingredients: butter, eggs, sugar, and salt were purchased at
local markets. Strains: Lactobacillus plantarum (98a), Lactobacillus
sanfranciscensis (BB12), Lactobacillus brevis (3BHI), and S. cerevisiae
(LBS) strains belong to the Department of Agricultural and Food Science
and Technology (DISTAL) of the University of Bologna (Italy).