This sauce is made with a combination of coarsely chopped shiitake, oyster mushroom, nameko, and porcini. The different mushrooms together create a layered texture and a pronounced earthy flavor. Black garlic further deepens the umami profile and adds a soft, rounded taste. Shallot and black peppercorns complete the sauce and bring balance to the flavor profile. The result is a rich sauce with a full, earthy base and a refined, balanced flavor structure.