Preheat your oven to 400°F and line a baking sheet with parchment paper.
Peel and dice the sweet potato, then steam or boil until tender, approximately 12-15 minutes.
Trim the woody ends off the asparagus, place them on the baking sheet, and roast for 10-12 minutes until tender-crisp.
While vegetables cook, season the salmon fillet with salt, pepper, and minced garlic.
Heat the olive oil in a non-stick skillet over medium-high heat.
Place the salmon in the pan and sear for 4-5 minutes on the skin side until crispy, then flip and cook for another 2-3 minutes until desired doneness.
Drain the sweet potatoes and mash them thoroughly until smooth, adding a splash of water or lemon juice if needed for consistency.
Plate the sweet potato mash, arrange the roasted asparagus alongside, and top with the seared salmon.
Finish the dish with a fresh squeeze of lemon juice over the salmon and asparagus.