01 - In a mixing bowl, whisk together soy sauce, honey, rice vinegar or lemon juice, sesame oil, minced garlic, grated ginger, and black pepper until well combined.
02 - Arrange salmon fillets in a shallow dish or resealable plastic bag. Pour half the marinade over the fillets and reserve the remaining marinade. Allow salmon to marinate at room temperature for 10 to 20 minutes.
03 - Preheat oven to 400°F, or heat a nonstick skillet over medium-high heat.
04 - Remove salmon from marinade, letting excess drip off. For oven baking, line a baking tray with parchment paper, place salmon skin-side down, and bake for 12 to 15 minutes, brushing with reserved marinade halfway through. For pan-searing, add a small amount of oil to the skillet, place salmon skin-side down, cook for 4 to 5 minutes, then turn and cook an additional 3 to 4 minutes. Pour reserved marinade into the skillet during the last 2 minutes to create a glaze.
05 - Transfer cooked salmon to serving plates. Top with sesame seeds and sliced spring onions. Accompany with lemon wedges, if preferred.