Cacio e pepe: Italy's beloved three-ingredient pasta dish

Cacio e pepe is a dish of only three ingredients, two of which are evident at first glance to anyone familiar with Roman dialect. Cacio is Romanesco for sheep’s milk cheese. Along with pepe, or black pepper, the cheese – ideally Pecorino – unites with pasta (and a hefty dose of starchy cooking water) to form a rich, creamy sauce that is as delicious as it is difficult to perfect.