Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Toss the broccoli florets on the baking sheet with extra virgin olive oil and half of the sea salt, black pepper, and garlic powder.
Spread the broccoli in a single layer and roast for 15 to 18 minutes until the edges are tender and slightly charred.
While the broccoli roasts, pat the salmon fillet completely dry with a paper towel to ensure a perfect sear.
Season the salmon evenly with the remaining sea salt, black pepper, and garlic powder.
Heat the avocado oil in a cast iron or stainless steel skillet over medium-high heat until it begins to shimmer.
Place the salmon in the pan skin-side down and sear for 4 to 5 minutes without moving it to develop a crisp, golden skin.
Carefully flip the fillet and cook for an additional 2 to 3 minutes until the fish is just opaque and flakes easily with a fork.
Plate the salmon immediately alongside the roasted broccoli and finish the dish with a fresh, bright squeeze of lemon juice.