Sourdough bread is an integral part of Polish life. Polish towns are full of piekarnias (bakeries) as bread is eaten for breakfast and supper, as a snack or as a main meal. This recipe takes a delicate hand as it’s quite a moist dough but this makes for a great loaf.Sourdough bread is an integral part of Polish life. Polish towns are full of piekarnias (bakeries) as bread is eaten for breakfast and supper, as a snack or as a main meal. This recipe takes a delicate hand as it’s quite a moist dough but this makes for a great loaf.