Turn the Instant Pot on to SAUTÉ and add 1 tbsp of avocado oil to the liner as it heats up. Sprinkle the pork tenderloin all over with salt and pepper.
1 lb pork tenderloin, Salt and pepper
Once the Instant Pot indicates that it's "hot", add the meat and sear for 2 minutes. Flip and brown the other side for 2 more minutes. Remove the pork from the Instant Pot and set aside.
Add another tablespoon of avocado oil to the Instant Pot, then add minced garlic. Cook for 1 minute until fragrant. Add bone broth, let it come to boil, then scrape the bottom of the pot with wooden spoon to deglaze.
6 garlic cloves, 1 cup bone broth
Turn off the Instant Pot, and stir in dijon mustard, coconut aminos, and thyme.
1/4 cup dijon mustard, 2 tbsp coconut aminos, 2 tsp fresh thyme
Add the pork tenderloin. Close the lid, set the pressure valve to "sealing," then cook on MANUAL for 0 minutes. The pork will cook while the Instant Pot pressurizes then depressurizes. Once the Instant Pot beeps to a finish, release pressure naturally for 15 minutes before opening the pressure valve. Open the lid.
Remove the pork from the Instant Pot, leave the sauce, and rest the meat for 5 minutes. While the pork is resting, turn the Instant Pot on to SAUTÉ.
In small bowl, whisk together arrowroot starch and water. Pour into the Instant Pot. Simmer the sauce for 4-5 minutes until thickened to your liking.
1 tbsp arrowroot starch, 1 tbsp water
Slice the pork into medallions. It should be slightly pink inside. If it's too raw for your liking, add to the simmering sauce for a few minutes until cooked through.
Serve pork medallions drizzled with the thickened garlic dijon sauce.