Agrodolce Pork Loin with Grapes, Parsley and Hazelnuts

INSTRUCTIONS

1. START: Season the pork on all sides with salt and pepper. On a 6-quart Instant Pot, select More/High Sauté. Add the oil and heat until shimmering. Add the pork fat side down and cook until golden brown, about 10 minutes. Using tongs, transfer to a plate. Add the shallots to the pot and cook, stirring occasionally, until browned and slightly softened, about 4 minutes. Add the honey and continue to cook, stirring, until slightly darker in color, 1 to 2 minutes. Stir in the vinegar, bring to a simmer and cook, stirring occasionally, until slightly reduced, about 2 minutes. Press Cancel then set the pork fat side up on the rack with handles. Place in the pot and pour in any accumulated juices.
2. Fast: Lock the lid in place and move the pressure valve to Sealing. Select Pressure Cook or Manual; adjust the pressure level to Low. Set the cooking time for 25 minutes. When pressure cooking is complete, allow the pressure to reduce naturally, then release any remaining steam by moving the pressure valve to Venting. Press Cancel, then carefully open the pot. The center of the pork loin should register 135°F.
3. FINISH: Using a kitchen towel or tongs, carefully grab the handles of the rack and lift it out with the pork loin. Set on a large plate or cutting board. Select More/High Sauté and bring the liquid to a simmer. Whisk in the butter one piece at a time until fully incorporated. After all the butter has been added, cook until the sauce is glossy and a spoon drawn through it leaves a trail, 10 to 12 minutes. Meanwhile, in a small bowl, stir together the parsley, grapes, hazelnuts and 1/4 teaspoon each salt and pepper; set aside. When the sauce is done, press Cancel to turn off the pot. Taste and season with salt and pepper. Transfer the pork from the rack directly to the cutting board. Thinly slice the pork and transfer to a platter, then spoon the sauce on and around the meat. Serve with the parsley-grape mixture.