01 - Preheat your oven to 400°F. Line a baking sheet with parchment paper or lightly grease it to prevent sticking.
02 - In a small saucepan, combine soy sauce, honey or maple syrup, rice vinegar, mirin (if using), grated ginger, minced garlic, and sesame oil. Bring the mixture to a simmer over medium heat.
03 - Stir in the cornstarch slurry and cook, stirring constantly, until the glaze thickens noticeably, about 1-2 minutes. Remove from heat and set aside.
04 - Place salmon fillets on the prepared baking sheet, skin-side down. Brush each fillet generously with half of the teriyaki glaze, ensuring even coverage.
05 - Bake for 12-15 minutes, or until salmon flakes easily with a fork and is just cooked through. The internal temperature should reach 145°F.
06 - Remove salmon from the oven and brush with the remaining teriyaki glaze for a glossy finish.
07 - Sprinkle with sliced green onions and toasted sesame seeds. Serve immediately with lemon wedges on the side.