Homemade dry yeast from Ancient Rome

Pliny the Elder (23 or 24 - 79 AD), in his “Naturalis Historia“, wrote down this recipe for a grape based dry yeast. Yeast derived from grapes is what I commonly use for baking Roman bread, now drying and storing it for the year would be fantastic. Let’s try!
You need: fresh grapes and bran (wheat or millet)
Have you heard of my historical cookbook yet? “GARUM - Recipes from the Past“ presents a range of dishes from ancient Mesopotamia until the Renaissance. Or visit me on instagram at @trullocicerone or my website at trullocicerone.com.
Music: Mystic Force Kevin MacLeod (incompetech.com)
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