When you are hunting around Boston for something ethnic, where do you head? For me, (and I live in Arlington), I aim for these places..
I am not listing meat, seafood, and produce, but there are enough threads here mentioning Dewars, Russos, Savenors, etc.
Korean/Japanese - Reliable Market or Kotobukiya (till May 10), H-mart when it finally opens..
Chinese - Super 88 (I like the one in Malden) or Ming's Supermarket
Middle-Eastern - Arax and Sevan in Watertown
Italian - Salumeria Italiano in the NE or Bob's Food in Medford
Mexican/South American - Hi-Lo in JP, Tropical Food on Washington
Eastern European - Berezka Deli or Bazaar in Allston
Spices - Penzeys in Arlington or Christina's in Inman
As for Indian, seems like there are small markets everywhere, but there's a place in Waltham on Moody that seems well stocked..
in the north end, pace is well-stocked for italian and on blackstone st. there are several middle-eastern markets downstairs that carry loads of goods. there is also a syrian grocer in the south end, right near the franklin, with unpredictable hours but excellent inventory.
Korean - Reliable Market, Mirim, John's Market
Chinese - Kam Man
Armenian and Middle Eastern- Sevan, Arax, Massis, Bay Sweets, Sabb's, Cedar's, Bob's/Droubi Bakery, Syrian Grocery Importing Co.
Indian - Waltham India Grocery was my go-to before Patel Bros moved in, but they have some really good stuff too. Shalimar is the best closer to Cambridge/Boston
E. European - Bazaar/Berezka, Baltic Deli, Euromart
SE Asian - Paylin Lynn Market, Full Moon
Latino - La Favorita, Tropical Foods
Italian - J Pace (downtown or behind MGH), Salumeria Italiana, Dave's Fresh Pasta, Sessa's
angkor watt market and angkor thom market on shirley ave in revere for cambodian and other se asian goods
I'll have to look in Harvest next time I am in Central - but I have a hard time believing they'd beat out Penzey's for spices - Penzey's has like 4 kinds of curry powders, 8 kinds of peppercorns, etc, and they sell them in small jars at pretty decent prices..
I had forgotten about Sabb's and Cedar's, and I work out here in Norwood.. man, Sabb's makes a mean shwarma