Twenty-five years ago, the first time I spent any appreciable time in Puebla, I fell in love with crusty submarine-like tortas filled with spicy, chipotle-smoky shredded pork layered with the local fresh cheese and intensely flavored avocados. The same crowd-pleasing filling is welcome in soft tacos, too, as you might imagine. Or just served on it’s own like you would a bowl of chili. The flavor of tinga appeals to practically everyone everywhere.
If your slow cooker has an insert that can go on the stovetop, heat the oil in it over medium-high heat. (If it cannot go on the stove or you do not have a removable insert heat the oil in a very large (12-inch) non-stick skillet.) Once the oil is very hot, add the pork and chorizo in a single layer and cook, stirring until the meat has browned, about 6 to 8 minutes. Turn off the heat and place the insert into your slow cooker (if you’re using a skillet, transfer the meat and its juices into the slow cooker). Add the potatoes, onions, garlic, tomatoes with their liquid, chipotles, chipotle sauce, Worcestershire, oregano and 1/2 teaspoon salt and stir to mix thoroughly. Cook at the highest temperature.
The tinga will be finished after 6 hours at the highest temperature, though you can hold it for longer. (My slow-cooker can be programmed to switch from high after 6 hours to a keep-warm low temperature for up to another 6 hours. Some slow cookers click to keep-warm automatically; others need to be switched manually.)
After six hours, gently stir the tinga. If the sauce seems too thick, stir in a little water. Taste, and season with salt if you think the dish needs it. Scoop into a large bowl, sprinkle with the fresh cheese and diced avocado, and serve with warm tortillas.