Preheat the oven to 425°F.
Peel and cube the half sweet potato. Boil the cubes in lightly salted water until tender, about 10-12 minutes, then drain.
Season the sweet potato cubes with a pinch of salt and pepper. Mash them with a fork until smooth. Optionally, add a teaspoon of olive oil for extra creaminess.
Trim the woody ends off the asparagus. Toss the asparagus with half the olive oil, salt, and pepper, and spread them on a baking sheet.
Roast the asparagus in the oven for about 10-12 minutes until tender and slightly crisp.
Meanwhile, pat the salmon fillet dry with paper towels and season both sides with salt and pepper.
Heat a non-stick skillet over medium-high heat and add the remaining olive oil. Once hot, place the salmon fillet skin-side down (if applicable) and sear for about 3-4 minutes until a golden crust forms.
Turn the salmon and cook for an additional 2-3 minutes until the salmon reaches your desired doneness.
Plate the seared salmon alongside a generous serving of sweet potato mash and roasted asparagus. Serve warm.