[idiotsecant]

10lb of lions mane would make an absolutely enormous amount of crab cake meat. Even if you figure you can sweat 60% of the moisture out of your mushrooms (which you probably won't, but let's assume that) that's still 4lb of 'crab' for 2 people. Most crab cake recipes call for 1 lb of crab for about 6-8 patties. Mushrooms might be a little bit less dense, but not that much less dense.