Melt the yeast in the lukewarm water. Mix all ingredients and finally add the water-yeast mixture and the balsamic vinegar.
Heat the oven to 220 °C. Fill the dough into a greased Roman pot (for 1 kg) and put it into warm water for about half an hour. (Until the dough volume has approximately doubled) Bake for about 1 hour at 220 °C on the lowest rack of the oven! (Wooden stick test, after a certain time cover the dough, notching is not necessary) :Preparation time: about 30 min.
Difficulty: normal