01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - Pat salmon fillets dry and season both sides with salt and black pepper. Arrange fillets skin-side down on the prepared baking sheet.
03 - In a small saucepan, combine pineapple juice, soy sauce, honey, vinegar, garlic, and ginger. Bring to a simmer over medium heat, stirring occasionally.
04 - Once simmering, stir in the cornstarch-water mixture. Continue to cook for 1–2 minutes, stirring, until the glaze thickens.
05 - Brush half of the glaze over the salmon fillets.
06 - Bake salmon for 12–15 minutes, depending on thickness, until just cooked through and flaky.
07 - Remove from oven and brush with remaining glaze. Top with diced pineapple, cilantro or green onion, and sesame seeds if desired.
08 - Serve immediately with steamed rice or vegetables.