We are not in a wasteland. 10 or so years ago we were but no longer. East Boston and other communities have huhe Mex/Central Am populations and they have brought the cuisine of their countries.
I usually dislike it when posters present "credentials" to support thei claim but I will give you some background. I have spent anywhere from a week to 2 months every winter in MX and opened 2 tacquerias (not in Boston)..over the last 20 years. Our #1 best sellers were Baja fish tacos and carnita in various form..plates, tacos, burritos. Most of our chefs come from Puebla and Baja and my partner married a lovely woman from Puebla, and they have son who is like my nephew. These women (all the cooks are women) didn't forget how to cook, when they crossed the border to the US. The food is delicious and obviously authentic. All salsas are made from scratch in house.
I eat enough MX food from trips to MX and my own places but I have eaten at Angela's (not a tacqueria but more sopistcated dishes) and think it's terrific. I haven't eaten at the other places; but they are recommended here by people's whose food/taste opinion I respect. Sorry but I can't provide favorites or not so favorites.
Please branch out from Jose's and I think you'll be surprised at how improved Boston's MX food is. If I was able to open a better than decent tacqueria in the American SE, there's no reason that someone can't open 1 in Boston..:)
We're actually not in a wasteland. Angela's Cafe in East Boston, Cafe Azteca in Lawrence, El Sarape in Braintree, Taqueria El Amigo and Taqueria Mexico in Waltham, and La Siesta in Winthrop are all very good to excellent places.
5 Commercial St, Braintree, MA 02184
Taqueria El Amigo
196 Willow St, Waltham, MA 02453
24 Charles St, Waltham, MA 02453
180 Common St, Lawrence, MA 01840