Pho Saigon 80 Wood Ave 203-334-8812
Extremely barebones little family-owned parlor, usually deserted, clueless as to the operation of a restaurant. Really excellent Pho (beef noodle soup). this place doesn't belong here, please get word out or it will vanish, a big loss.
Garibaldi 1703 Park Ave 203-362-1065
Great nice people, and they're Oaxacan! They mostly make the standard stuff, but they can be persuaded to make a few Oaxacan things like tlayudas. They make Oaxacan style tamales on weekends, and might be persuaded to make mole negro tamales if you place a large order with a generous deposit.
Beira-Mar Bakery 344 James St 203-366-0155 outstanding portuguese pastel de nata (egg custard tarts)
El Pueblito 1222 State St 203-332-4408 an older find (I first landed here on their opening day...they consider me sort of their "founding gringo customer"), which I need to revisit. Unless they've gone downhill fairly recently, this is the best columbian restaurant I know.
Also one over the border in Westport:
Galaxy Cookies 47 Saugatuck Ave 203-226-9731 Makes some really really well-made (but non-snobby/precious) cookies. Expensive, naturally.