Lay the Instant Pot trivet in the bottom of the pot.
Add the mirepoix to the pot (Chopped onion, carrots, and celery) and arrange it under and around the trivet.
Pour the turkey or chicken broth into the pot.
Place the turkey breast onto of the trivet, breast side up.
Place the lid on pot, turn to locked position, and set vent to sealed position.
Set the Instant Pot to pressure cook for 30 minutes.
When cooking time is complete, allow the pot to naturally release pressure for 15 minutes.
Once the 15 minutes is up, quick release the rest of the steam by turning the vent to venting position and allow steam to vent until the floating valve drops.
Turn lid to unlock it, and remove it from the pot.
Using oven mittens, remove the trivet and turkey breast from the pot and slide the turkey breast onto a baking sheet.
Set your oven to broil and place the turkey breast in the oven and allow it to broil for about 8 minutes until the skin is golden brown.
Once the skin has browned, remove it from the oven and place foil over the turkey allowing it to rest until you're ready to cut and serve it.