Preheat your oven to 425°F.
Peel and dice the sweet potato into cubes; place them in a pot with water and bring to a boil. Simmer until tender, about 15 minutes.
While the sweet potato cooks, toss the asparagus with half the olive oil, a pinch of salt, and pepper, then spread on a baking sheet.
Place the asparagus in the preheated oven and roast for about 10-12 minutes until tender and slightly charred.
In a skillet, heat the remaining olive oil over medium-high heat. Season the salmon fillet with salt, pepper, and minced garlic.
Sear the salmon fillet, skin side down first, for about 3-4 minutes per side or until golden and cooked through.
Once the sweet potato is tender, drain and mash it with a fork. Season with salt and pepper to taste.
Plate the sweet potato mash, top with the seared salmon, and add the roasted asparagus on the side. Squeeze a lemon wedge over the salmon just before serving.