Preheat the oven to 375°F (190°C). Line a baking dish with parchment paper.
Prepare the marinade: In a bowl, mix soy sauce, honey, olive oil, lime juice, garlic, ginger, and red pepper flakes.
Marinate the salmon: Place salmon fillets in the baking dish. Pour the marinade over them, ensuring even coating. Let sit for 10 minutes.
Add pineapple: Scatter pineapple chunks around and on top of the salmon.
Bake: Place the dish in the oven and bake for 18-20 minutes, or until salmon is flaky and cooked through.
Garnish: Sprinkle chopped green onions and sesame seeds before serving.
Serve: Enjoy hot with steamed rice or roasted veggies!