Preheat your oven to 425°F (220°C).
Begin by washing the asparagus and sweet potato. Cut the asparagus into even pieces, and cube the sweet potato into small, uniform pieces for even roasting.
Place the sweet potato cubes and asparagus on a baking sheet lined with parchment paper. Lightly spray with a non-stick cooking spray and season with a pinch of salt and pepper.
Roast the vegetables in the oven for about 15-20 minutes, stirring halfway through, until tender and slightly caramelized.
While the vegetables roast, pat the salmon fillet dry with a paper towel. Season both sides with salt and pepper.
Heat a non-stick skillet over medium-high heat. Once the pan is hot, add the salmon fillet skin-side down. Sear for about 3-4 minutes, then flip and cook for another 3-4 minutes, or until the salmon is cooked through but still moist.
Remove the salmon from the pan and drizzle a little fresh lemon juice over the top for brightness.
Plate the salmon alongside the roasted asparagus and sweet potato cubes. Serve immediately and enjoy your balanced dinner.