When you are married EVERY DAY is a date
Well the outcome: I didn't go for the quiche consistency because the shrooms turned out to not have enough of a cup shape to hold it in. Just a little egg to sort of hold it together. I had thought about breadcrumbs before you mentioned them Mr. Saint, but must have forgotten. I did use some major -brand- comes - in -green-cardboard tube "parmesan" and that actually gave a crispy texture to the top. All in all it worked out very well. I just had one!
I shall certainly consider your fish cake idea as well as Brandye's gorgonzola suggestion. I think this sort of stuff would go over great next time we have a "tapas" night.
I wonder if Brandye has a favourite brand or style of single malt whisky, since she is close to the source, so to speak.