Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Place the broccoli florets and sliced red bell peppers on the baking sheet, then drizzle with half of the olive oil and season with a pinch of sea salt and the garlic powder.
Toss the vegetables to coat evenly and roast in the oven for 15-18 minutes until they are tender and show slight caramelized edges.
While the vegetables roast, pat the salmon fillet completely dry with a paper towel to ensure a crispy sear.
Season both sides of the salmon with the remaining sea salt and the black pepper.
Heat the remaining olive oil in a stainless steel or cast-iron skillet over medium-high heat until the oil is shimmering.
Carefully place the salmon skin-side down in the pan, pressing firmly with a spatula for 30 seconds to prevent the skin from curling.
Sear the salmon for 4-5 minutes without moving it to allow the skin to become golden and crispy.
Flip the fillet carefully and cook for an additional 2-3 minutes until the salmon is opaque and reaches your desired level of doneness.
Remove the salmon from the pan and let it rest for 2 minutes before drizzling with fresh lemon juice and serving alongside the roasted vegetables.