The Blue Oyster Mushroom (Pleurotus Ostreatus-columbinus) is a delicious gourmet mushroom, natural to European deciduous forests. These dried morsels can be reconstitued with water to add to sautés, or used to make soup bases & sauces. Gourmet mushrooms can be a healthful & ecologically concientious meat replacement, & add flavour & nutrition to your meals. 25g of dried oyster mushrooms is the equivalent of approximately 150g of fresh mushrooms.