Clean, wash and drain the mushrooms. Possibly halve them. Peel and dice garlic and onions. Wash the rosemary. Fill mushrooms into prepared twist-off jars
Bring 1 l water, vinegar, rosemary, onions, garlic and spice ingredients to the boil
Pour boiling hot stock over the mushrooms, close the lid (keep the rest of the stock). On the 2nd day pour off the stock, bring to the boil again and pour over the mushrooms. Repeat on the 3rd day. If necessary, always add the rest of the stock so that the mushrooms are covered. Leave to stand for approx. 1 week