Preheat the oven to 425°F.
Wash and scrub the sweet potato, then cut it into 1/2-inch cubes.
Toss the sweet potato cubes with a little salt, pepper, and a drizzle (1/2 tsp) of olive oil. Spread them on a baking tray.
Roast the sweet potatoes in the oven for about 20-25 minutes until tender and lightly browned.
Meanwhile, trim the asparagus and toss with a pinch of salt, pepper, and the remaining olive oil if desired.
Heat a non-stick skillet over medium-high heat. Season the salmon fillet with salt and pepper.
Sear the salmon, skin-side down first if applicable, for about 3-4 minutes per side until a golden crust is formed and the fish is cooked to your desired doneness.
Lightly steam or sauté the asparagus until tender yet crisp, about 3-4 minutes.
Plate the seared salmon alongside the roasted sweet potatoes and asparagus, and drizzle the lemon juice over the salmon.
Serve immediately and enjoy your balanced, flavorful meal.