Slice them into quarters and weigh them, tare a jar add them to a the jar. Take a 4-6% ratio of salt to mushroom weight. Add salt to a small pot, one tablespoon sugar or not (I feel this rounds out the flavor and sweetness of the mushrooms). Add same volume of water as jar to pot. Add aromatics like clove, bay leaf, juniper, chili flakes, peppercorns whatever you like but don’t over do it. Bring pot to a boil and pour in mushroom jar. Seal lid and let sit until room temperature. Refrigerate and give them a couple of days before serving.