I recently tried El Baqueano - restoelbaqueano.com
What a nice surprise. I’ve walked by it for the past few years, always a bit hesitant, because they serve “native” meats, birds, etc. The menu is limited to a AR$160 tasting menu (under US$40) for several courses that are the most interesting and tasty I’ve had in Buenos Aires. (I’m not talking about big hunk of dead cow tasty, I’m talking about innovative food.) In fact, I much preferred this meal over the tasting menu at Pura Tierra. One of the courses was a tribute to El Bulli. Fear not, this isn’t a restaurant full of foams.
The wine list had a few options in each of many varietals. The server (one of the owners) was quite knowledgeable in everything she served, and knew the wines well. As much as you might be afraid of eating llama carpaccio, well, you shouldn’t be, nor with ñandu (an ostrich like bird), or yacare (alligator-like) -filled gyoza, or anything else we ate, including an edible wood.
The restaurant is located in San Telmo. A thoroughly pleasant experience. They also offer a 4 pour wine pairing for $115pp - we instead started with a bottle of rose, followed by a bottle of red. The wine price points will not ruin your meal - they cover a wide range starting in the just-under US$20/bottle, and most categories had something in the under US$25 range (and of course, a lot higher, should you choose).