Costillas de Cerdo al Chiltepin Sonorenses

This is from Sonora. Not the central highlands, not the south, the north. Sonora is desert and ranchland, and the cooking shows it: wheat instead of corn for the tortillas, beef and pork over fish, mesquite over banana leaf, and the chiltepin, a wild round chile the size of a peppercorn that grows on bushes in the foothills of the Sierra Madre and is harvested by hand each fall.

Do not call this dish spicy and leave it at that. The chiltepin is hot, yes, but its heat is specific. It hits sharp, lasts a few seconds, and leaves clean. Sonorenses call it el chile mosquito for that reason. A pinprick. The heat is not the point. The flavor underneath the heat, sharp and grassy and dry like the air it grew in, is the point. Substitute cayenne or chile de arbol and you have a different dish from a different state. No me vengas con atajos.

The ribs are slow-braised in lard, beer, garlic, and oregano sonorense until the meat pulls back from the bone, then finished over mesquite if you have a grill. The flour tortillas are not optional and they are not a Tex-Mex invention. The north has been making flour tortillas since wheat arrived with the Jesuits in the 17th century. Cada estado, su propia cocina. In Sonora, the cocina is wheat, beef, pork, mesquite smoke, and the chile that nobody outside the state can pronounce correctly. I collected this version from a woman named Dona Elvira in Hermosillo who would not give me her recipe until I had eaten three plates and admitted, out loud, that the chiltepin had won.