Rehydrating dried Shiitake overnight in a refrigerator is all it takes to make them extremely delicious!
When using them to make Sushi, please be sure to use a little more seasoning than you normally would for the usual stewed Shiitake dishes.
When making Sushi rice, putting the rice on a wooden cutting board and fanning off the excess moisture will give it that professional-quality flavor.
If you want to change to a Vegan recipe, please refer to this recipe.
https://shiitakejapan.com/en/vegan-braised-shiitake-vegetarian.html