Clean the mushrooms, making sure to remove any excess dirt.
Fill a large pot with water (enough to hold all of the mushrooms) and bring the water to a boil. Once the water is boiling, add the mushrooms and boil them for about 10 minutes, until they are cooked. When finished, drain the water away from the mushrooms.
In a separate, small pot, add the marinade ingredients. Bring them to a boil.
In a large jar, stuff the mushrooms. You can add garlic cloves, onion, and thyme amongst the mushrooms for flavor!
Pour the boiled marinade into the jar, covering all of the mushrooms.
Let the mushrooms sit for about 3 days before enjoying.