"Chicken of the woods", Hen of the woods?, whatever, shelf fungus, grows on dieing hardwoods, often in huge quantities, cooks like chicken, looks like chicken, tastes like chicken, but costs more unless you can gather it yourself.It also lasts for weeks on top of the fridge, but there must be ways to keep it longer.
Probably tastes better than this stuff. My mother is super into mushroom foraging and made some for me with garlic and some herbal salt and while I don't think it tastes quite like chicken, it's definitely pretty damn good.
Ah!, though the hen of the woods must be all carbs then, as it didn't leave me hungry
and, it occurs to me that in certain tests, fungus might be smarter than chickens, something something, maze/logic tests of mycelium.