My sister discovered a really nice place for a sunny day in Lisbon. It's in one of the worst neighborhoods in terms of crime: Martim Moniz. However, they set up a market in the square that has helped bring a different crowd (namely all of Lisbon's hipsters and vintage/bike lovers). We went to a latin american stand called "El Cartel". It was pretty good, just a bit overpriced. Don't order the chili, you'll starve with the tiny portion. The rest is good.