(Optional) Roast bones for more flavor. If using raw bones, place them on a baking sheet and roast at 400°F for 25–30 minutes until golden brown.
Add bones, veggie scraps, herbs, salt, and vinegar. Cover with water—do not exceed the “Max Fill” line.
Secure the lid, set the valve to Sealing, and cook on High Pressure for 1 hour.
Let the pressure naturally release for 30–40 minutes. Then carefully open the lid.
Pour broth through a fine-mesh strainer or cheesecloth into clean jars or bowls. Let cool before refrigerating or freezing.