Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Toss the cubed sweet potatoes and halved Brussels sprouts on the sheet with half of the olive oil and a pinch of sea salt.
Roast the vegetables for 20 to 25 minutes, tossing halfway through, until the potatoes are tender and the sprouts are golden.
Season the pork chop on both sides with the remaining sea salt, black pepper, and garlic powder.
Heat the remaining olive oil in a heavy, oven-safe skillet over medium-high heat and sear the pork for 3 minutes per side until a crust forms.
In a small ramekin, whisk together the maple syrup, Dijon mustard, and finely chopped fresh rosemary.
Brush the glaze generously over the pork chop and place the skillet in the oven for 4 to 6 minutes to reach an internal temperature of 145°F.
Allow the pork to rest for 3 minutes before serving it alongside the roasted vegetable medley.