Truffle

Walk a pig you keep fed onto podzol, coarse dirt, rooted dirt, moss or mycelium in your claim and set her rooting with an empty hand every thirty fed minutes. A happy pig finds two.

Keep a pig fed in your claim and walk her onto podzol, coarse dirt, rooted dirt, moss or mycelium; every thirty fed minutes, an empty hand sets her rooting and up comes a truffle. 1 every 30 fed minutes, 2 from a happy one (groomed, with a hay bale near). Plant a little woodland in the pen: the soft ground is the point.