Reddit reviews Food from Finland: A Finnish Cookbook

Something that's more Christmas food nowadays, but used to be more generic food for feasts or other special occasions, are swede/rutabaga, carrot (and rice) and potato casseroles. E.g. This site has recipes for the first two in English: https://finland.fi/christmas/christmas-cookbook/#cas. Or then there's this endearingly home-made website (which, by the url, does seem to be just some individual person's personal website): http://www.saunalahti.fi/marian1/gourmet/xmas_c.htm, which also has the potato one.

And "Karjalanpaisti", a meat stew containing both pork and beef cubes, is now widespread and considered quite traditionally Finnish, but from the name I think it's at least possible it used to mostly be eaten in the southeast, and spread across Finland after WWII, the same as the karjalanpiirakat/karelian pastries.

We had this book at home when I was a kid (lived abroad, having an English source for the names of ingredients was handy + to share and teach recipes to housekeepers etc.), I think my mom still has it somewhere, and I still think it's a great English-language source for Finnish foods and maybe some culture too (although the 1980s perspective may of course now be dated in parts, Finnish cuisine has diversified since, but that covers the traditional stuff really well). Kind of hard to find now though. ;)