In a small bowl, mix together the mirin, sake, tamari, miso paste, roasted sesame oil, grated ginger, and honey. Whisk until smooth. This will be the magic potion that transforms your salmon.
Place your salmon fillets in a shallow dish or a resealable plastic bag. Pour the marinade over the salmon, ensuring that each fillet is well coated. Cover the dish or seal the bag and refrigerate for at least 30 minutes, and up to 2 hours for deeper flavor.
Depending on your choice, preheat your grill, oven, or skillet. If grilling or broiling, preheat the grill to medium-high heat. If baking, set your oven to 400°F (200°C).
If Grilling: Remove salmon from marinade, allowing excess to drip off. Place on the grill skin-side down. Cook for about 6-8 minutes, or until the salmon easily flakes with a fork.
If Sautéing: Heat a skillet over medium heat and add a splash of oil. Cook the salmon fillets skin-side down for 4-5 minutes, then flip and cook for another 3-4 minutes until beautiful and golden.
Once cooked, sprinkle the salmon with sesame seeds and thinly sliced scallions. Serve it hot alongside your chosen sides like jasmine rice or miso soup.