One of those odd memories recently included beurre de sardine. Yes, sardine butter... It doesn't sound super exciting when you put it like this but it is actually quite delicious. I am not speaking about the lumpy one we had to eat at the school canteen but the one made at home with great care and the nicest canned sardines (I used to live on the Atlantic seaside where there were lots of local cannery factories then).
I guess at the time it was the school and our parents' own sneaky way of making us French kids eat oily fish by blending it into a fine paté style consistency.