Traditional Finnish star-shaped Christmas tarts.
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I've eaten a lot of these. Haven't really ever made any of them all by myself, although it shouldn't be difficult if you use ready-made puff pastry sheets. The most common filling is prune jam, although there are many other options that some like to use. Some like to warm them up before eating. I like them best in room temperature with some whipped cream.
This most common shape has been described as a star or a a pinwheel (someone was horrified thinking it represents a swastika.) There's also a half moon shaped version which is more convenient as all of the filling is on the inside.
This looks like a pretty good recipe (the first one I found in English)
https://mydearkitcheninhelsinki.com...rttu-finnish-pinwheel-shaped-christmas-tarts/