01 - Preheat oven to 400°F. Line a baking tray with parchment paper and set aside.
02 - Pat salmon fillets dry with paper towels. Season generously with salt and freshly ground black pepper on all sides. Place fillets skin-side down on the prepared baking tray.
03 - In a small saucepan, combine pineapple juice, honey, gluten-free soy sauce, grated ginger, vinegar, and minced garlic. Bring to a gentle simmer over medium heat, stirring occasionally to dissolve the honey.
04 - Once the mixture reaches a simmer, whisk in the cornstarch slurry. Continue cooking and stirring constantly for 2 to 3 minutes until the glaze thickens enough to coat the back of a spoon. Remove from heat.
05 - Using a pastry brush, generously brush half of the thickened glaze over the top and sides of each salmon fillet. Reserve the remaining glaze for finishing.
06 - Transfer the tray to the center rack of the oven. Bake for 10 to 12 minutes until the salmon is just cooked through and flakes easily with a fork.
07 - Remove the salmon from the oven and immediately brush with the remaining glaze. Garnish with chopped cilantro and finely diced fresh pineapple. Serve right away with lime wedges alongside steamed rice and sautéed greens.