Instructions

1. Everything in the pot: Break up the turkey carcass so it fits below the max fill line of your Instant Pot or other pressure cooker. (Max fill is ⅔rds of the way up the pot if you don’t have a line). Add the onion, celery, carrot, bay leaves, and salt to the pressure cooker pot, then add water to cover by 1 inch, or to the max fill line on the pressure cooker. (About 3 quarts of water) 
2. Pressure cook for 1 hour with a Natural Release: Cook on high pressure for 60 minutes in an electric or stovetop PC. (Use “Manual” or “Pressure Cook” mode in an Instant Pot.) Let the pressure come down naturally – at least 30 minutes. (It takes a long time for all that water to cool off. If you’re in a hurry, let the pressure come down for at least 20 minutes, then quick release any remaining pressure.)
3. Strain and save the broth: Scoop the bones and vegetables out of the pot with a slotted spoon and discard. Strain the broth through a fine mesh strainer and discard the solids. Refrigerate the broth for up to 3 days, or freeze in 2-cup containers for up to 6 months.