Pasta all’Amatriciana indicates a pasta sauce from Amatrice, an earthquake ravaged town in the province of Rieti, in northern Lazio. The sauce consists of guanciale, local pecorino cheese, tomato, and, in some cases, onion. It can have a slight spiciness as well.
The dish is a traditional pasta dish of Rome along with Pasta alla Carbonara and and Pasta alla Gricia.
The picture is from one of our favorite traditional restaurants in Rome, Pommidoro in San Lorenzo near the University.