Place New Mexico chiles in a heat-proof bowl.
Bring chicken broth to a boil in a small saucepan. Pour over the chiles; left soften, about 30 minutes.
Turn on a multi-cooker (such as Instant Pot(R)) and the select Saute function. Coat pork with flour and add to pot in batches; saute until golden brown, about 15 minutes.
Transfer soaked chiles to a blender. Add broth, garlic, and chipotle peppers; blend until smooth.
Combine blended chile sauce, onion, vinegar, salt, oregano, and cumin in a bowl; pour sauce over the pork.
Close and lock the lid. Select high pressure according to manufacturer's instructions; set timer for 20 minutes. Allow 10 to 15 minutes for pressure to build.
Release pressure carefully using the quick-release method according to manufacturer's instructions, about 5 minutes. Unlock and remove lid. |