Went to the Baltic European Deli this weekend (across from Café Polonia). Another spot good enough to justify the drive.
The small freezer case near the front door holds containers of the same stuffed cabbage rolls that are served at Café Polonia they taste just like Grandma madeem containers of 3 rolls for $4.99. There are also many kinds of soup, most not labeled, or only labeled in Polish you have to be a bit adventurous. I stocked up big on the cabbage rolls and they were just as good as I had remembered from last winter perfect pre-Sox dinner last night. (No directions on the container I bake them covered for about an hour at 350 after thawing the filling seems to be uncooked when you get it.)
The shelves carry every kind of Polish grocery item, including many varieties of sauerkraut and dill pickle, plus mustards, jams, etc. Through experimentation I have found I prefer Polonaise brand sauerkraut, the one that has shredded carrots in it (although they do not appear on the list of ingredients) -- $1.89 for a huge jar.
There are a large variety of baked goods which look alluring although I have not sampled them.
The refrigerator case at the back contains Bobaks Double-Smoked Hunter brand bacon, recommended last year on a bacon thread on the General Topics board. It comes in small hunks you slice yourself and it is perfectly luscious. There are also a variety of fresh pierogis and blintzes, matjes herring from Germany and other smoked fish.
Last stop is at the deli counter where they are happy to recommend a kielbasa based on your preference I highly recommend the one they give you when you specify the smokiest, spiciest one they have although I have now had 4 different ones, all good. They also have a bacon that comes in sort of a 3 inch square and (they say) is already cooked its great sliced thick and cooked like regular bacon.
Baltic European Deli, 632 Dorchester Ave (near Andrews Square) open every day but closes early on Sundays.