I knew two things when I went truffle hunting: that those edible underground fungi are delicious, and that portly pigs snort around in woods to find them. One of those bits of information turned out to be wrong. Yes, you can forage for truffles in the Pacific Northwest and, yes, I had watched the wildly underrated Nicolas Cage movie Pig too many times. But the rarer, more delectable species of truffle grows in Europe. After a brief walking tour …