Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Toss the cubed sweet potatoes with one teaspoon of avocado oil, sea salt, and black pepper, then spread them in a single layer on the baking sheet.
Roast the sweet potatoes for 20-25 minutes until tender and slightly browned on the edges.
While the potatoes roast, prepare the asparagus by trimming the woody ends and seasoning with a pinch of salt.
Heat the remaining teaspoon of avocado oil in a non-stick skillet over medium-high heat.
Pat the salmon fillet dry with a paper towel and season both sides with salt and pepper.
Place the salmon in the hot skillet, skin-side up, and sear for 4-5 minutes until a golden crust forms.
Flip the salmon and add the asparagus to the pan, cooking for another 4-5 minutes until the salmon is cooked through and asparagus is tender-crisp.
Plate the seared salmon alongside the roasted sweet potatoes and asparagus.
Drizzle the entire dish with fresh lemon juice before serving.