If you have an abundance all at once, have you considered dehydrating them to use later? I grow shiitake mushrooms on oak logs, and when they Fruit, I have way too many to use fresh. I bought a dehydrator and it only takes about 24 hours. Then you can store them and enjoy them all year long. Just put them in hot water and they rehydrate in no time, and when cooked they are nearly as good as fresh!