@msolga,
p.s. ...
You don't have to make the "Lemon-Shallot Butter", either.
I usually just spread a little butter (if I'm using it at all) over the fish with a knife, then squeeze the lemon juice over, then put cut lemon pieces on top & sprinkle the fresh herbs over the lot.
Anyway, whatever you decided to do with this fish, enjoy, Roberta!