01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or lightly oil it.
02 - Pat salmon fillets dry with paper towels and season both sides with salt and black pepper. Place fillets skin-side down on the prepared baking sheet.
03 - Combine orange juice, honey, soy sauce, rice vinegar, ginger, garlic, and orange zest in a small saucepan. Simmer over medium heat for 4 to 5 minutes, stirring occasionally until slightly thickened. Remove from heat.
04 - Brush each fillet generously with the orange glaze, reserving some for later.
05 - Bake the salmon for 12 to 15 minutes until cooked through and easily flaked with a fork; internal temperature should reach 125–130°F for medium doneness.
06 - Remove from oven, brush with additional glaze, and garnish with green onions and toasted sesame seeds if desired. Serve immediately with orange slices.