Preheat Your Broiler**: Set your oven to broil.
Cut the poblano and jalapeño peppers in half. Remove the seeds and membranes for less heat, or leave them intact if you prefer the spicines
Place the halved peppers, tomatillos, garlic, and onion on a baking sheet. Brush with a little Bit of the oil and place under the broiler, not the top rack but the rack just under, and broil for about 5-7 minutes.
Once charred, remove the vegetables from the oven and let them cool slightly.
In a large Dutch oven, heat the avocado oil over medium-high heat
Season the pork with 1 tsp of the salt and 1 tsp of the pepper, and sear in batches if needed Sear the pork on all sides until browned (about 5-7 minutes).
In a blender or food processor, blend the broiled vegetables alone with a handful of cilantro until smooth.
Pour over the pork and add the remaining salt, pepper, and seasonings and 2 cups of the chicken stock and bring to a simmer.
simmer on low heat for 1½-3 hours, or until the pork is tender and easily shreds. Make sure to check occasionally and add more chicken stock if necessary.
Or place the dutch oven in a 325° oven
If using a crock pot sear the pork and add it to the crock pot. Make the sauce and add it to the crockpot alonge with the remaining seasonings and chicken stock.
Cover and cook on low for 6-8 hours or on high for 3-4 hours, until the pork is tender and flavorful.