This truffle sauce is made of mixed mushrooms and black summer truffle. The black truffle sauce is perfect on toasts, mixed directly with tagliatelle or arranged over a meat dish. Black truffle sauce is also a great addition to sauteed vegetables or as a ravioli filling. Tuber Aestivum, also called summer truffle or truffe de la Saint Jean, has a black envelope with well-marked asperities. Its flesh is beige/ochre in color with a network of fine white marbling. Light and fleeting, its aromas remind us of mushrooms and damp earth with a delicate hazelnut taste. Black summer truffles are available and in season from May to September in France, Italy and Spain.