Preheat your oven to 400°F.
Peel and cube the sweet potato into 1-inch pieces, toss with a drizzle of olive oil, salt, and pepper, and spread evenly on a baking sheet.
Trim the asparagus ends, toss with a small amount of olive oil, salt, and pepper, and add to the baking sheet with the sweet potato.
Roast the sweet potato and asparagus in the oven for 20-25 minutes, stirring once halfway through, until tender and lightly caramelized.
While the vegetables are roasting, season the salmon fillet with salt, pepper, and a squeeze of lemon.
Heat a non-stick skillet over medium-high heat. When hot, add the salmon skin-side down and sear for about 3-4 minutes until crisp, then flip and cook for an additional 2-3 minutes until the salmon is just cooked through.
Plate the seared salmon alongside the roasted sweet potato and asparagus. Serve immediately with an optional drizzle of lemon juice.