Ocopa

Ocopa belongs to the picantería tradition of Arequipa in southern Peru — the old taverns where chicha (corn beer) was sold alongside spicy stews. Its defining ingredient, huacatay (Tagetes minuta, Andean black mint), is a pre-Hispanic Andean herb, and grinding sauces on a stone batán long predates the colonial era; the dish itself is generally treated as a regional folk preparation rather than one with a documented inventor or date. The name is widely linked to the Quechua word for this kind of ground sauce. The peanuts and cheese reflect the post-contact pantry, while the herb base keeps it rooted in the highlands.

Cold slices of yellow potato lie under a smooth, sage-green sauce, crowned with an olive and a wedge of egg. The first taste is rich and unmistakably nutty from the peanuts, then the huacatay opens up — herbal, faintly anise, almost minty — and the ají mirasol brings a warm, fruity heat at the back rather than a sharp burn. The cheese and evaporated milk round it into something creamy and clinging, thick enough to coat each slice evenly.

Everything hinges on the sauce, traditionally ground on a stone batán until completely smooth. The peanuts are toasted first to deepen their flavor and supply the oil and body that carry the herb; the ají mirasol (a sun-dried ají amarillo) is fried with onion and garlic to bloom its aroma before grinding. Huacatay is potent, so it is added in measured amounts — too much turns the sauce medicinal. Evaporated milk and a little bread or cracker emulsify the cheese-fat and chili-oil so the sauce stays creamy and does not split; the potatoes are boiled, cooled fully, then sauced cold.