There is one Finnish bakery in Lake Worth called Scandia on Rt.1. Can't think of any restaurants, though, which is strange, because Lake Worth has the largest population of Finns outside of Helsinki. If you find one, let me know.
And last I checked, there was another Finnish bakery on US1 in an old strip center inneighboring Lantana, the heart of the local Finnish community. Same strip has a Finnish butcher shop and maybe some other businesses tucked in.