Preheat your oven to 400°F (200°C). Begin by trimming the woody ends off the asparagus.
Season the pork tenderloin generously with salt, pepper, and a pinch of garlic powder on all sides.
Heat a skillet over medium-high heat and add a drizzle of olive oil. Once hot, place the pork tenderloin in the pan and sear on all sides until golden, about 2-3 minutes per side.
Transfer the seared pork to a baking sheet and pop it into the preheated oven. Roast for about 12-15 minutes, or until the internal temperature reaches 145°F (63°C).
While the pork roasts, toss the asparagus with a small amount of olive oil, salt, and pepper. Spread them out on another baking sheet and roast in the oven for about 10 minutes until tender and slightly crispy.
Prepare the quinoa according to package instructions if not pre-cooked. Fluff with a fork before serving.
Once everything is ready, slice the pork tenderloin, and serve alongside the roasted asparagus and a side of quinoa.