Step 1

In a pressure cooker, combine pork, tomatillos, Poblano peppers, Anaheim peppers, serrano peppers, onion, garlic, cumin, and a big pinch of salt. Heat over high heat until gently sizzling, then seal pressure cooker, bring to high pressure, and cook for 30 minutes. Release pressure.

Step 2

Using tongs, transfer pork pieces to a bowl and set aside. Add cilantro and fish sauce to remaining contents of pressure cooker. Blend with an immersion blender or in a countertop blender, then season to taste with salt. Return pork to sauce and stir gently to combine. Serve immediately with tortillas and lime wedges.