Preheat oven to 400°F (200°C) and line a baking sheet with foil or parchment paper.
In a small bowl, whisk together Dijon mustard, maple syrup, minced garlic, olive oil, dried thyme, salt, pepper, and apple cider vinegar.
Pat the pork tenderloin dry with paper towels and place it on the prepared baking sheet.
Brush approximately two-thirds of the maple mustard mixture over the pork, coating all sides.
Roast in the preheated oven for 20 to 25 minutes, or until the internal temperature reaches 145°F (63°C).
Remove the pork from the oven and brush with the remaining glaze.
Let the meat rest for 10 minutes before slicing into medallions to allow juices to redistribute.