Chefs Roland Passot, Raphael Lunetta, Giulio Gigli and Ken Frank before the Truffles and Wine Dinner at La Toque, Napa

Truffle-fest lunch at Pine Ridge Vineyards

Ukranian honey cake with Perigord black truffles

Dr. Paul Thomas, truffle scientist

A prized Perigord black truffle

Liam Mayclem, festival MC

Rico, the truffle-hunting dog