The best chefs in Chile are Peruvian and Peruvian restaurants can be found all over the country. One of the best in Santiago is Puerto Peru, on the corner of Condell and Santa Isabel (border Providencia/Nunoa).
The Pulpo al Olivar (octopus with black olive dressing) is divine and the Seco de Cordero is excellent as well. Most items on the menu are very good and the Pisco Sours are some of the best in Santiago.
Okay, so maybe you don't want to eat Indian food in Chile. But it is the most delicious Indian food in perhaps the entire continent, seriously. I ate there four times in two weeks, that's how lovely it was.
Calle Santa Domingo
Nearest station: Santa Ana
It's a classic old style bar/bistro/restaurant with a bit of style and little pretension. Quality food, and wine of course, it's smokey and well decorated, a picture of classical South American dining.
Liguria. Av. Providencia 1373.
Metro Tobalaba (North exit).
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