Made with Acorns - Acorn Levain à la Tartine

During my childhood, we kids used to gather acorns and chestnuts (not the edible kind) to make funny little gnomes from them. Nice and shiny as they looked, I knew that only pigs and squirrels could eat them, they were much too bitter for human consumption.
When I read a facebook post ("Bread History & Practice") about the possibility to use acorns in bread baking, I was intrigued - the huge European oaks in our neighborhood had produced a bumper crop of acorns this year.