Chiles Rellenos de Chile de Agua con Quesillo

This is an Oaxacan dish. Not a Pueblan one. Puebla has its chiles rellenos de poblano, and they are fine, but this is something else entirely. The chile de agua is a chile that grows almost exclusively in Oaxaca's Valles Centrales, in the fields between Ocotlan and Zaachila, and if you haven't been to the mercados in that region, you may never have seen one. It is light green, thin-skinned, about the length of your hand, with a clean vegetal heat that sits between a poblano and a jalapeno but tastes like neither. It is its own thing. Cada estado, su propia cocina.

The stuffing is quesillo, Oaxaca's string cheese, pulled apart into threads and tucked inside the roasted, peeled chile until it is full but not bursting. When the chile hits the hot oil inside its egg batter, the quesillo melts into long, stretching strands that pull when you cut into it. That pull is the signature. If you use mozzarella or Monterey Jack, you will get a melting cheese, but you will not get quesillo's particular lactic tang or its texture. The cheese matters as much as the chile.

The capeado, the beaten egg coating, is where the cook shows her hand. You separate the eggs. You beat the whites until they hold stiff peaks. You fold the yolks back in gently. You dust the stuffed chile in flour so the batter grips. Then you lower it into hot oil and do not touch it until the bottom sets. I learned this from a senora in Etla who made twelve of these every Friday for her family, and she told me the secret was patience. "No lo toques," she said. Don't touch it. Let the oil do the work.

The caldillo is not a sauce. It is a broth, a light tomato bath made from roasted tomatoes, onion, and garlic, just enough liquid to cradle the chile on the plate and give you something to spoon over each bite. Some cooks in the Valles Centrales add a sprig of hierba santa to the caldillo. If you can find it, do. If not, the tomato speaks for itself. Recetas probadas y garantizadas.