Preheat the oven to 400°F (200°C).
Toss the broccoli with 1 tablespoon of olive oil, salt, and pepper, and spread it on a sheet pan.
Roast for 8 minutes.
While the broccoli roasts, whisk together the honey, soy sauce, rice vinegar, chili flakes, garlic, and remaining tablespoon of olive oil.
Push the broccoli to one side of the pan and add the salmon fillets to the empty space.
Brush the honey-chili mixture generously over each salmon fillet.
Return the pan to the oven and roast for 12-15 minutes, until the salmon is cooked through and the broccoli is tender with crisp edges.
Sprinkle with sesame seeds before serving.