Causa limeña

Causa limeña is a cold dish made with cooked yellow potatoes mashed and seasoned with ají amarillo, lime juice, oil, and salt until it becomes a soft but firm dough. The dough is assembled in layers, like a pie, with filling between them: shredded chicken with mayonnaise, tuna, crab or other seafood, and sometimes avocado. On top it is usually garnished with hard‑boiled egg, a black olive, and a bit more ají.

Its roots are Andean. Potato and ají have been cultivated in Peru long before the arrival of the Spanish, and researchers link the name causa to the Quechua word kawsay, associated with sustenance and life. The lime, oil, and fillings arrived with colonial cuisine.

The name causa limeña has a story told in Lima. According to tradition, during the Independence campaign in 1820–1821, women sold the dish in the city’s streets and squares to help pay the expenses of José de San Martín’s army, announcing it was "for the cause." The same story is repeated for the War of the Pacific at the end of the 19th century. These are popular accounts without documentary confirmation.

Today causa is eaten throughout Peru as a starter or light dish, and appears in versions with different fillings. In Lima it is commonly found on criollo food menus and at family tables.