Preheat your oven to 400°F and line a baking sheet with parchment paper.
Peel the sweet potato and cut into small cubes, then boil in a pot of water for 10-12 minutes until tender.
Snap the woody ends off the asparagus and toss the spears with half of the olive oil and a pinch of salt.
Roast the asparagus in the oven for 10-12 minutes until tender but still crisp.
Season the salmon fillet with sea salt, black pepper, and garlic powder on both sides.
Heat the remaining olive oil in a non-stick skillet over medium-high heat.
Sear the salmon skin-side down for 4-5 minutes, then flip and cook for another 3-4 minutes until golden and flaky.
Drain the sweet potatoes and mash them thoroughly, adding a splash of lemon juice for brightness.
Plate the sweet potato mash, top with the seared salmon, and serve the roasted asparagus on the side.