Pickled mushrooms are traditional to Russian cuisine, especially as a winter treat. They could be used in salads, pies, as a side dish, as is, and as a perfect zakuska (snack) with a side of vodka. There are several methods to prepare pickled mushrooms, but two main ways are marinated and salted. Marinated mushrooms are prepared with salt and vinegar (and sometimes with sugar), whereas salted, as you can guess, just with salt. Spices may vary, but mostly used are garlic, dill, bay leaf, and black pepper corns.
Click here to see this recipe: http://www.recipestudio.com/2010/10/pickled-mushrooms.html