Location: Zé dos Cornos, Beco Surradores 5, 1100-591 Lisboa, Portugal
Getting there: Rossio station
Classic Portuguese restaurant
Specialty: Traditional food. Good for meat (specially) and fish
Price range: $ (<30)
Pro tip: Recommended if you want to try a very local restaurant (there are many in Lisbon, but it is really good option)
Recommended by @Pitufueros