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 with 1 tsp of olive oil and a pinch of sea salt.
Spread the sweet potatoes on the baking sheet and roast for 15 minutes.
Trim the woody ends off the asparagus, toss them with the remaining 1 tsp of olive oil, and add them to the baking sheet with the potatoes for another 10 minutes.
While vegetables roast, season the steak on both sides with sea salt, black pepper, and dried rosemary.
Heat a cast-iron skillet over medium-high heat until very hot, then sear the steak for 3 to 4 minutes per side for medium-rare.
Reduce the heat to low, add the ghee and minced garlic to the pan, and use a spoon to baste the steak with the garlic-infused ghee for 1 minute.
Remove the steak from the pan and let it rest for 5 minutes to lock in the juices before slicing.
Serve the sliced steak alongside the roasted sweet potatoes and asparagus.