Crumble the yeast in a large bowl and mix with the honey. Add lukewarm water, buttermilk, salt and vinegar. Add the flour and knead in until a smooth dough is formed (the amount of flour can vary +/- 150 g). Cover and let the dough rise for a good half an hour until it has doubled.
Now shape 3 loaves of bread from the dough, place on a prepared baking sheet and let rise for another 30 minutes.
Put top / bottom heat in the preheated oven at 200 ° C (no circulating air!). After a baking time of 20 minutes, turn the temperature down to 160 ° C. The bread needs a total of 45-50 minutes in the oven.