Most mushrooming expeditions yield enough fungi for a meal or two. Occasionally, one finds a huge number of mushrooms. This poses a dilemma - most wild mushrooms do not keep well, even in the fridge, so what to do with them? Preserving is the answer. (Although, if you know you are not going to have enough time to preserve them, stop picking and leave them to someone else, or to the wildlife.) The main preserving options are drying or pickling. You could also make a big batch of mushroom soup and freeze it.