Preheat your oven to 400°F.
Pat the 6 oz pork tenderloin dry with paper towels. Season lightly with salt and pepper if desired.
In a small saucepan, combine 2 tablespoons of apple cider vinegar and 1 tablespoon of honey. Bring to a simmer over medium heat and let reduce slightly until it becomes a glossy glaze, about 3-4 minutes.
While the glaze is reducing, heat a skillet over medium-high heat. Sear the pork tenderloin on all sides for about 2 minutes per side until lightly browned.
Place the seared pork tenderloin in an oven-safe dish. Brush half of the apple-cider glaze over the pork.
Toss 1 cup of asparagus with 1 teaspoon of olive oil, and place them on a baking sheet in a single layer.
Put both the pork and the asparagus in the preheated oven. Roast the asparagus for 10-12 minutes until tender and lightly crisp, and bake the pork for about 15-18 minutes until it reaches an internal temperature of 145°F.
Remove the pork from the oven, brush it with any remaining glaze, and let it rest for 5 minutes before slicing.
Serve slices of apple-cider glazed pork tenderloin alongside the roasted asparagus for a balanced, flavorful dinner.