Rigatoni con la Pajata

Pajata belongs to Rome's 'quinto quarto' (fifth quarter) tradition: after the four prime cuts of a slaughtered animal were sold to the wealthy, the offal — organs, tripe, intestines — was distributed as wages to the workers of Rome's municipal slaughterhouse or sold cheaply in surrounding taverns. The Mattatoio di Roma, inaugurated in 1891 in the Testaccio district, gave the tradition its geographic home. The dish predates the slaughterhouse; 18th-century records of the offal market near Piazza Navona already document intestine vendors. In 2001, during the European BSE crisis, EU regulations banned bovine intestinal products, nearly eliminating the dish from restaurant menus. The restrictions were eased for Italian domestic consumption around 2015, and pajata cautiously returned to the trattorie of Testaccio.

The rigatoni ridges catch both tomato and yielding chunks of intestine in every forkful; the curd within gives a sudden creamy richness — like finding a pocket of soft cheese — set against the acid of the tomato and the sharp bite of pecorino romano.

The small intestine of the milk-fed calf retains partially digested milk rich in rennet enzymes secreted by the calf's abomasum. During low-temperature braising over 60–90 minutes, these enzymes cleave casein proteins, causing the milk proteins to aggregate into a semi-solid curd — the same biochemical process used in cheesemaking. The resulting curd melts into the tomato sauce, releasing fat and denatured casein that thicken and enrich the liquid. The tomato's natural acidity further promotes casein precipitation. Tying the intestines into rings preserves the curd inside the tube throughout the long cooking process.