Preheat oven to 375°F and spray a glass baking dish with oil.
Whisk together soy sauce, honey, oil, garlic, and ginger in a small bowl.
Arrange salmon fillets in the baking dish and coat with glaze.
Add pineapple chunks and red onion on top, then spoon on more glaze and season with salt and pepper.
Bake approximately 20 minutes, or until salmon flakes easily. (Optional: Broil for 3–5 minutes for a caramelized top.)
Garnish with parsley and serve.