Save the soaking liquid from dried mushrooms for plant-based soup
When you soak dried porcini or shiitake, the water picks up mushroom flavour too. Lift out the mushrooms, then strain the liquid through a fine sieve to remove grit before adding it to a soup or stew. Count it as part of the liquid the recipe calls for, rather than adding extra water on top. Cook the mushrooms and broth as directed by your recipe and the packet; soaking alone isn’t the cooking step.