Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
Peel the sweet potato and cut it into 1/2-inch cubes.
Toss the sweet potato cubes with 0.5 tsp of olive oil and a pinch of sea salt, then spread them in a single layer on the baking sheet.
Roast the sweet potatoes for 20-25 minutes, tossing halfway through, until they are tender and lightly browned.
While potatoes roast, season the salmon fillet evenly with garlic powder, sea salt, and black pepper.
Heat the remaining 1 tsp of olive oil in a non-stick skillet over medium-high heat.
Place the salmon in the pan skin-side up and sear for 4 minutes until a golden crust forms, then flip and cook for another 3-4 minutes until cooked through.
Steam the broccoli florets for 4-5 minutes until they are bright green and tender-crisp.
Plate the salmon alongside the roasted sweet potatoes and steamed broccoli, finishing with a fresh squeeze of lemon juice over the entire dish.