In an Instant Pot or other stove top pressure cooker, combine pork, tomatillos, Poblano peppers, Anaheim peppers, jalapeños or Serranos, yellow pepper, onions, garlic, oregano, cumin, and salt (also add 1-2 habanero pepper and additional Serranos if you want added heat).
4 pounds boneless pork shoulder,, ¾ pound tomatillos,, ⅔ pound Poblano peppers,, 6 ounces Anaheim or Cubanelle peppers,, 2 jalapeno or serrano chilles,, ½ yellow bell pepper,, ½ cup green onions,, 1 medium white onion,, 7-8 medium cloves garlic,, 1 teaspoon dried Mexican Oregano, Generous pinch of Kosher salt, 1-2 habenero peppers,, 1 Tablespoon plus 1 teaspoon whole cumin seed,
Using tongs, or slotted spoon if pork pieces are small, transfer pork to a bowl and set aside. Add ½ cup cilantro and ½-1 Tablespoon fish sauce to remaining contents in the pressure cooker. Blend with an immersion blender or in a countertop blender, then season to taste with salt, about 1 ½ teaspoons. Return pork to the sauce and stir gently to combine. Serve immediately OR better yet, cool and place in 6 quart container with lid and keep in refrigerator for up to 3 days, at least overnight. Reheat over medium heat on stovetop and enjoy.
½ cup loosely packed fresh cilantro leaves and fine stems,, ½ to 1 Tablespoon Asian fish sauce