Turn Instant Pot to Saute mode, and once hot add 3 tablespoons of butter.
When melted add the sliced onions and 1/2 teaspoon of salt.
Cook onions for about 5-6 minutes or so until they are nice and caramelized. If they are starting to burn turn Saute heat level down.
After they are golden brown turn Saute mode off. Add the chicken thighs and the simmer sauce. Close the lid, and cook the chicken for 12 minutes on Manual mode (or Poultry mode if it’s still set to that on your Instant Pot).
Once done let the pressure naturally release for 5-10 minutes, and then quick release. Open the lid, and shred the chicken using two forks.
dd a nice squeeze of lime, black pepper, and more salt if necessary. You can also add some cayenne pepper or hot sauce if you want a little more spice.
Assemble sliders with pickles, arugula, lettuce, or slaw mix, and fried onion strings.
DO NOT FORGET THE FRIED ONION STRINGS!