With Da Rosario, Safina brings the purity of organic elements to his ardour for gourmet dried truffles and mushrooms with the launch of the first-ever USDA 100% natural truffle line. Prepare the dehydrator: Line the dehydrator trays with parchment paper to stop the Bagnoli's Black Truffle slices from sticking. Test for doneness: The truffle slices ought to be dry and crisp to the touch when they're prepared. In case you have any questions or would like to buy our Fresh Perigord Black Truffles or talk about wholesale prices, please get in contact.