** I usually double this recipe because frequently pork tenderloin comes in a two pack
Instructions
Mix dijon mustard, brown sugar, sea salt, and black pepper in a small mixing bowl. Pat the pork tenderloin dry and brush the marinade over the top using a basting brush - you will want a thick even layer of the marinade
Preheat your air fryer to 350F. Spray the air fryer basket with a spray oil and place the pork tenderloin in it. Cook the pork at 350F for 22-25 minutes. Check the internal temperture with an electronic thermometer and when it reaches 145F-150F the pork is done.
Remove the pork from the air fryer and allow the pork to rest on a cutting board for 5-10 minutes before slicing into rounds.
Notes
Doneness: Air fryer times vary by model and by the weight of your tenderloin, so go by temperature rather than the clock. Pull the pork when the thickest part reads 145°F, then rest it 5 to 10 minutes before slicing. It will climb a few degrees as it rests.Slicing: Cut into half-inch slices across the grain, not with it.Size: This is written for a 1 lb tenderloin. A larger one needs more time; start checking the temperature a few minutes early either way. If it doesn’t lie flat in your basket, cut it in half crosswise rather than bending it to fit.Doubling: Tenderloins usually come two to a pack, so I cook both. Leave space between them in the basket and expect to add a few minutes.Lower sodium: Cut the salt to 1/2 teaspoon. The Dijon brings plenty of seasoning on its own.Storage: Keep leftovers in an airtight container in the fridge up to 4 days. Sliced cold over salads is the best use for them.