Prep the pork: Pat the pork tenderloin dry with paper towels. Trim any silver skin for even cooking and better texture.
Rub with olive oil.
Season generously: In a small bowl, mix salt, pepper, garlic powder, onion powder, smoked paprika, thyme or rosemary, and brown sugar if using. Coat the pork evenly on all sides.
Preheat the air fryer: Heat to 400°F (200°C) for 3–5 minutes. A hot basket helps develop that flavorful crust.
Air fry the pork: Place the tenderloin in the basket, leaving space around it.
Cook for 10 minutes, then flip. Continue cooking 8–12 minutes, or until the thickest part hits 140–145°F on an instant-read thermometer.
Rest the meat: Transfer to a cutting board and tent loosely with foil. Rest 5–10 minutes to keep the juices in.
Target final temp around 145°F after carryover.
Make the chutney: While the pork cooks or rests, set a small pan over medium heat with butter or oil. Sauté onion until soft, about 3–4 minutes. Add garlic and ginger; cook 30 seconds until fragrant.
Simmer the apples: Stir in diced apples, vinegar, brown sugar or maple, raisins or cranberries, cinnamon, mustard, red pepper flakes, and a pinch of salt.
Cook, stirring occasionally, for 8–12 minutes until apples soften and the mixture thickens and turns glossy. Adjust sweetness, salt, or vinegar to taste.
Slice and serve: Slice pork into 1/2-inch medallions. Spoon warm chutney over the top.
Finish with a few cracks of black pepper and a sprinkle of fresh herbs if you like.