These are the mushrooms I used. This pack of 400 grams. We'll take two packs like this.

Put to boil the water. Once the water starts to boil, put into the pan is not thawed (!!!) mushrooms: the first one pack, then as soon as the mushrooms are separated by a second.

Once the mushrooms have begun to boil, put salt, clove buds and pepper. Reduce the flame and cook on slow heat for 20 minutes, stirring occasionally. At the end of cooking add vinegar, turn off the heat and close the lid. Allow to cool a little and put in jars. The output is a little more than 1 liter. You can eat immediately as soon as the mushrooms cooled down.