Preheat your oven to 400°F and line a small baking sheet with parchment paper for easy cleanup.
Toss the diced sweet potatoes with half of the olive oil, sea salt, and black pepper on the prepared baking sheet.
Roast the sweet potatoes for 20-25 minutes, tossing halfway through, until they are tender and golden brown.
Season the salmon fillet evenly on both sides with the remaining sea salt, black pepper, and garlic powder.
Heat the remaining olive oil in a non-stick skillet over medium-high heat until shimmering.
Place the salmon in the skillet and sear for 4 minutes, then flip and cook for another 3-4 minutes until opaque and flaky.
While the salmon cooks, steam the broccoli for 5-6 minutes until it reaches a bright green, tender-crisp texture.
Plate the salmon alongside the roasted sweet potatoes and broccoli, finishing the dish with a fresh squeeze of lemon juice.