How to Make It
Place bones in bottom of an Instant Pot. Top with carrots, onions, celery, garlic, parsley, thyme, bay leaf, salt, and peppercorns. Add apple cider vinegar. Pour water over ingredients, making sure contents stay below the max fill line. Put lid on, and turn steam valve to “sealing” position. Set on high pressure for 2 hours (pot will take about 20 minutes to build pressure).
Carefully release the pressure, and let stand 10 minutes. Skim off as much fat as possible from surface.
Strain contents to separate solids from liquid; discard solids. Pour liquid through a strainer lined with cheesecloth. Serve immediately, or chill for best results and enjoy later. Once chilled, skim remaining fat.