Pico de Gallo con Xoconostle de Don Francisco

Guanajuato's northern Bajio, dry and nopal-heavy where the land leans toward the Sierra Gorda, is where Don Francisco's pico de gallo belongs. The acid is not lime. It is xoconostle, the sour cactus fruit that grows on nopales tough enough for heat, dust, and poor soil. You taste the place before you taste the tomato.

Do not confuse xoconostle with sweet tuna. Sweet tuna is for eating out of hand with sticky fingers. Xoconostle is tart, firm, and stubborn, with the seeds held in the center and the flavor in the thick wall of the fruit. At the market in Guanajuato, the women will show you the difference before they let you waste your money. Preguntale a las señoras del mercado.

The women who make this in Guanajuato's markets perfected the order: xoconostle first with salt, then jitomate saladet, cebolla blanca, chile serrano, cilantro, and avocado only at the end. A food processor is lazy here. It bruises the tomato and turns avocado into paste. Knife work is the technique. No me vengas con atajos.

At the table this belongs in mayolica de Dolores Hidalgo, with tostadas beside it and grilled meat coming off the asador. It is picnic food, yes, but not careless food. The balance is exact: acid from cactus fruit, fat from avocado, heat from serrano, freshness from cilantro. This is a 32-state cuisine, and Guanajuato has its own voice.