One of the 'treats' available during Christmas season in Finland is ginger cookies.
A couple years back someone convinced all of Finland that it was a good idea to put blue cheese on the cookie. I have tried it and it is OK. I had pointed out to my Finnish in-laws that you could put anything on these ginger cookies and they would still taste OK. To drive my point home, I put some 'egg butter' (chopped boiled egg mixed with butter) and I have to say that it tastes better than using blue cheese. And this is coming from a person who hates boiled egg!
I think this year I will try salmon paste.