In a small bowl, whisk together the maple syrup, soy sauce, Dijon mustard, minced garlic, grated ginger, and sesame oil until well combined.
Place the salmon fillets in a shallow dish and pour the marinade over them, ensuring each fillet is well coated. Marinate for at least 30 minutes in the refrigerator.
Preheat your oven to 400°F (200°C).
Line a baking sheet with parchment paper for easy cleanup.
Remove the salmon from the marinade, reserving the marinade for later. Place the fillets on the prepared baking sheet, skin-side down.
Season the salmon fillets with salt and pepper to taste.
Bake in the preheated oven for about 12-15 minutes, or until the salmon is cooked through and flakes easily with a fork.
While the salmon is baking, pour the reserved marinade into a small saucepan and bring to a boil over medium-high heat. Cook for about 3-5 minutes, stirring occasionally, until the sauce has thickened slightly.
Once the salmon is done, remove it from the oven and brush generously with the thickened maple glaze.
Serve the salmon with a sprinkle of sesame seeds and sliced green onions on top for garnish.