01 - Pat pork tenderloins dry with paper towels. Rub both tenderloins with kosher salt, black pepper, and fresh thyme.
02 - Heat olive oil in a large oven-safe skillet over medium-high heat. Sear the pork tenderloins on all sides until golden brown, about 2-3 minutes per side.
03 - Whisk together apple cider, Dijon mustard, and brown sugar in a bowl until smooth.
04 - Pour the glaze over seared pork tenderloins in the skillet. Transfer skillet to preheated oven at 400°F and roast for 18-22 minutes, basting twice during cooking, until internal temperature reaches 145°F.
05 - Transfer pork to a cutting board and let rest for 5 minutes. Slice into medallions and serve drizzled with pan juices.