Mix dry yeast with 375 ml of lukewarm water. Mix flour with salt and knead with the yeast water. Let this dough rise for about 0.5 hours.
Peel the onion and roast in a pan with a little oil until golden brown. Add the bacon and brown it briefly. Let the mixture cool down. Add the cooled onion and bacon mixture to the dough and knead vigorously. Let the dough rise for another 0.5 hours.
Shape small rolls with wet hands and then place them on a baking tray lined with baking paper. Bake in a preheated oven at 200 degrees top / bottom heat for about 0.5 hours, depending on the size of the rolls.