Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Toss the cubed sweet potatoes with half of the avocado oil, garlic powder, and a pinch of salt.
Spread the sweet potatoes on the baking sheet and roast for 15 minutes.
Move the potatoes to one side of the tray, add the asparagus, and drizzle with a tiny bit of water or the remaining oil, then roast for another 10-12 minutes until tender.
While vegetables roast, season the salmon fillet with remaining salt and garlic powder.
Heat a non-stick skillet over medium-high heat with the remaining avocado oil.
Place the salmon skin-side down in the pan and sear for 4-5 minutes until the skin is crispy.
Flip the salmon and cook for an additional 2-3 minutes until the internal temperature reaches 145°F.
Plate the salmon alongside the roasted sweet potatoes and asparagus, finishing with a squeeze of fresh lemon if desired.