Sprinkle the pork with salt and pepper. Add the pork to a large pressure cooker over high heat and cook until browned on all sides, about 8 minutes. Remove the pork and add the Anaheim and poblano peppers, onions and garlic. Saute until translucent, and then return the pork back to the pot. Mix thoroughly, and then deglaze with the chicken stock, white wine and vinegar. Reduce for 5 minutes, and then add the water, cumin, oregano, bay leaf, 1 tablespoon salt and 1 tablespoon pepper.
Grill the husked tomatillos over an open flame (or under a broiler) until lightly charred all over – this will give the finished chile a rich, smoky flavor. Set aside to cool, and then roughly chop and add to the pressure cooker. Tear up the hydrated pasilla chiles and add to the pressure cooker, along with the water used to rehydrate them.
Place a lid on the pressure cooker and cook for 30 minutes. When done, release the pressure, remove the lid and thicken the mixture by whisking in the masa harina. Finish with a squeeze of fresh lime juice. Serve in bowls and garnish with fresh cilantro, crispy tortilla strips and cotija cheese.