Preheat your oven to 400°F and line a baking sheet with parchment paper.
Peel and cube the sweet potato into half-inch pieces, then toss them on the baking sheet with 1 tsp of olive oil, smoked paprika, and a pinch of sea salt.
Roast the sweet potatoes for 20-25 minutes, tossing halfway through, until they are tender and golden-brown.
While potatoes roast, season the sirloin steak on both sides with garlic powder, sea salt, and black pepper.
Heat the remaining 0.5 tsp of olive oil in a heavy cast-iron skillet over medium-high heat until shimmering.
Place the steak in the hot skillet and sear for 4-5 minutes per side for medium-rare, or until it reaches your desired level of doneness.
Remove the steak from the pan and let it rest on a cutting board for 5 minutes to keep the juices intact.
While the steak rests, add the asparagus to the same skillet and sauté for 3-4 minutes until bright green and tender-crisp.
Slice the steak against the grain and serve alongside the roasted sweet potatoes and asparagus.