Caved. Went to maccyds. OH. Got the most amazing 3 suenos mcflurry for 9 pesos!! Definitely worth it.
Prior to this, in search of some authentic argy food,, we headed off. Miraculously, all the places we tried to enter were "closed" and our protests were greeted by lots of shrugging and gesticulating, then, finally they turned their backs to us..... Not to be put off we continued our search. Ended up in a kitsch italian/american restuarant with no one else there. That should have alerted us. My gnochi arrived luke warm, soggy and floating in what appeared to be tomato soup.
Better luck next time!