Winter black truffle Food and drink · Fuentespalda, Matarraña, Teruel The kermes oak woods and the plantations of mycorrhized holm oak in the surroundings produce black truffle, which is gathered between December and March. The province holds a protected geographical indication for the Black Truffle of Teruel and the fungus has been taken up on the comarca's menus. Photo: Diego Delso (CC BY-SA 3.0) What to see and do in Fuentespalda