Pulpo al Olivo

The dish is credited to Rosita Yimura, a daughter of Japanese immigrants born in Callao and often called the mother of Nikkei cuisine. By most accounts she created it in the 1980s at her restaurant, Salón Rosita, while trying to recreate an octopus-and-mayonnaise idea from a chef friend; she settled on a homemade mayonnaise flavored with the dark, naturally salt-cured botija olive. Yimura died in 2004, and the restaurant continues under her son Akira. The dish exemplifies the Nikkei method — a Japanese cook's instinct for cleanly cooked seafood meeting a distinctly Peruvian ingredient, the botija olive of the southern coast.

Cool slices of octopus with a clean, faintly sweet bite and just enough give, blanketed in a thick olive mayonnaise that is salty, savory and almost meaty. The sauce carries the dark, briny depth of cured botija olives smoothed by egg and oil, so it coats rather than overwhelms. There is no heat and little acid — it is a study in richness and texture, often lifted by a squeeze of lime at the table.

Octopus is tough until its collagen breaks down, so it is simmered gently — often 45 minutes to an hour — until a knife slips into the thickest part; overcooking past that point turns it stringy. Many cooks blanch it three times or add a wine cork by tradition, but slow, steady heat is what matters. The sauce is an emulsion: egg yolk and oil whipped to a mayonnaise, then blended with cured botija olives, which lend their salt, color and umami without any added vinegar sharpness. Serving everything cold keeps the octopus firm and the sauce thick.