01 - Preheat oven to 400°F or set grill to medium-high heat.
02 - In a small saucepan, whisk together tamari, maple syrup, rice vinegar, sesame oil, minced garlic, and grated ginger until well combined.
03 - In a small bowl, mix cornstarch and water until completely smooth, then pour the slurry into the saucepan with the sauce base.
04 - Bring the sauce to a simmer over medium heat, stirring continuously until thickened, about 2-3 minutes. Remove from heat and set aside.
05 - Pat salmon fillets dry with paper towels and arrange on a parchment-lined baking sheet or a lightly oiled grill tray.
06 - Brush each salmon fillet generously with the teriyaki sauce, reserving a portion for finishing.
07 - Bake or grill for 10-12 minutes until the salmon is opaque and flakes easily in the center.
08 - Remove salmon from heat, drizzle with the reserved teriyaki sauce, and garnish with toasted sesame seeds and sliced spring onions. Serve immediately with steamed rice and vegetables.