Regarding the salmon roe, they have a porous membrane, which means… they can be marinated! Why let some caviar professional decide the seasoning level of your salmon roe when you can do it yourself? Give them an 8-hour soak in soy sauce or any other liquid/herb/spice combo you like, as long as it is kept cold. I've been known to add some sake and vanilla bean for fun. The sky is kind of the limit, as long as it's a cold sky.