632 Dorchester Ave, South Boston (Andrew T station), open 7 days (closes at 2 on Sundays) (also a location at 16 Cottage St, Lynn which I have not visited)
Stopped in at this great deli across and down a bit from Cafe Polonia, its offspring. They have a freezer full of frozen housemade foods that are on the Cafe Polonia menu -- stuffed cabbage, cabbage stew (bigos) and soups (most of which are labelled in Polish only). Package of 3 stuffed cabbage for 5 bucks. They also have a mind-boggling collection of different kielbasas for about $6 a pound, as well as different bacons. I got 2 kielbasas and 2 kinds of bacon (hey, it all freezes well). The staff is helpful and patient with neophytes. The kielbasa I have tried so far was fabulous -- I asked for a really garlicky spicy one and this is all of that plus very smoky -- very dark brown -- yum. There are also all kinds of Polish and Eastern European groceries -- I got 2 different types of sauerkraut, one with apples and carrots -- each $1.89 for a huge jar. Tons of good-looking breads and pastries too although I did not indulge in that area. Great place to stock up on comfort foods of the Eastern European type.