Cebollas en Escabeche con Chile de Agua

This is a Oaxacan condiment. Specifically from the Valles Centrales, the cluster of valleys around the city of Oaxaca where chile de agua grows and where the markets, Central de Abastos, 20 de Noviembre, Sanchez Pascuas, sell it by the kilo from June through September. Outside that season and outside that geography, you will not find this chile easily. That is the truth of it.

Chile de agua is not a substitute for anything and nothing is a real substitute for it. Light green, thin-walled, shaped like a small horn, it carries a clean grassy heat that lives somewhere between a guero and a young serrano, with a brightness the others do not have. It is the chile of the Valles Centrales the way poblano is the chile of Puebla. Use what is in season. If your market does not have chile de agua right now, the encurtido waits.

The vinegar is the other half of the dish. Vinagre de piña, made from pineapple peels fermented with piloncillo and water, has a fruity edge that white distilled vinegar will never match. The senoras at 20 de Noviembre keep crocks of it going year-round and ladle from it as needed. If you cannot make your own, find a Mexican brand at a tienda. Apple cider vinegar cut with a spoon of pineapple juice is a compromise, not an upgrade.

My mother kept a jar of cebollas en escabeche in the refrigerator at all times. Hers was a Jalisciense version with carrot and jalapeño. The Oaxacan version is leaner, sharper, and built around chile de agua specifically. I learned this version from a woman who runs a memelas stall at Mercado Sanchez Pascuas. She watched me write it down and told me, in that flat tone Oaxacan cooks have, to use real pineapple vinegar or not bother. Saber cocinar es saber vivir.