01 - Preheat oven to 400°F. Line a baking sheet with parchment paper or foil.
02 - Pat salmon fillets dry with paper towels. Rub with olive oil and season both sides with salt and pepper. Place on the prepared baking sheet.
03 - In a small saucepan over medium heat, combine pineapple juice, soy sauce, honey, rice vinegar, garlic, and ginger. Bring to a simmer and cook for 3-4 minutes.
04 - Stir in the cornstarch mixture and cook for 1-2 more minutes until the glaze thickens. Remove from heat.
05 - Brush half of the glaze over the salmon fillets.
06 - Bake for 10-12 minutes, or until just cooked through and flaky.
07 - Remove from the oven and brush with the remaining glaze. Garnish with fresh cilantro, scallions, and pineapple if desired. Serve immediately.