Bathilda the baker, a woman in her fifties, has wild dreams of making love to a demon at night. He spoke to her and told her of a skull buried under a stump in the forest. She seduced a woodsman to fell the tree and dig up the skull. As he climbed out of the pit, the woodsman tripped on a root and fell back, landing on the skull and piercing his heart on its single horn.
She puts the skull in with the coals of her oven when she bakes her bread. Each roll has a small spirit in it, capable of possessing someone who eats it, provided they eat it hot and fresh (the spirit rides the steam).
Bathilda spent a considerable amount of her small savings to rent a small place near her market stall, so the bread is hot and fresh. She has even started to serve goat stew (at a loss) to go with the fresh bread, encouraging her customers to eat it right there.