01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - In a small saucepan, combine soy sauce, mirin, honey, rice vinegar, ginger, garlic, and sesame oil. Bring to a simmer over medium heat.
03 - Stir in the cornstarch slurry and cook, stirring constantly, until the sauce thickens, approximately 2 minutes. Remove from heat.
04 - Arrange salmon fillets on the prepared baking sheet. Brush generously with the prepared teriyaki glaze, reserving some sauce for serving.
05 - Bake for 12–15 minutes, or until the salmon is cooked through and flakes easily with a fork.
06 - Switch the oven to broil and cook for an additional 1–2 minutes to caramelize the glaze.
07 - Transfer salmon to serving plates. Drizzle with reserved glaze and sprinkle with toasted sesame seeds, spring onions, and fresh cilantro if desired. Serve immediately.