Two guys enter to this place. One of them is wearing a long sleeved t shirt with the Argentinian flag in it. He is using his cell phone and apparently inviting other people to join him
Argentinian guy: Hey , this place looks good, come and join us!!!
Person that I couldn't´t hear: Where is it?
Argentinian guy: In front of the Plaza Las Heras
Person that I couldn't´t hear: Is it near Mcdonald´s
Argentinian Guy: Yes, it´s a Peruvian restaurant one block away from Mc donald´s
Nobody join them during they dinner, maybe their friends were tired and decided to eat dinner at home, maybe they decided to go to see a movie instead, or maybe they couldn't find this PERUVIAN place the guy was talking about...
The Peruvian place is¨"Ña serapia"; a little restaurant where you can find empanadas, locro, humitas, tamales, in a few words, their specialty is argentinean food (from the northwest). And if you have any doubt that they cook Argentinian food (maybe you are fooled by the weird name Ña serapia) just take a look at their walls and you´ll have no doubts: Gauchos, Boleadoras, and just in case you are totally clueless, the Argentinian flag.... But I guess that wearing a t shirt that shows our flag, being Argentinian, and living in Buenos aires doesn´t mean that you can distinguish between a Peruvian and an Argentinian restaurant...
Anyway. You have to go there. If you are searching for Authentic, this place is the best. Really good and dirty cheap. Tip the waiter. Maybe he brings you the wrong dish or whatever, but the is very nice. And if you don´t think he is nice it´s just because you cannot understand his weird sense of humour...
Quiz: Is this the Argentinian or the Peruvian flag? See the answer below

Answer: It´s the Argentinian Flag you dumb-ass