Preheat your oven to 400°F and line a baking sheet with parchment paper.
Peel and cube the sweet potato, then boil in a pot of water for 10-12 minutes until fork-tender.
Trim the woody ends off the asparagus and toss with half of the olive oil, salt, and pepper on the baking sheet.
Roast the asparagus for 10-12 minutes until tender and slightly charred.
Season the salmon fillet with garlic powder, salt, and pepper.
Heat the remaining olive oil in a non-stick skillet over medium-high heat.
Place salmon skin-side up in the pan and sear for 4-5 minutes until a golden crust forms.
Flip the salmon and cook for another 3-4 minutes until the fish is opaque and flakes easily.
Drain the sweet potatoes and mash them in the pot until smooth and creamy.
Plate the salmon alongside the roasted asparagus and sweet potato mash, finishing with a fresh squeeze of lemon.