Roland Foods Dried Mixed Wild Mushrooms Specialty Imported Food ,16 Ounce (Pack of 1)

When is the expire date?

How are these use in a recipe or salad - must they be soaked in water first?

There is white on several of the mushrooms. Is this normal? I contacted Roland receiving no response which is disappointing.

There appears to be some sort of white powder or mold on the mushrooms. Is that normal?