Preheat your oven to 375 degrees Fahrenheit.
Heat a large cast iron (or other oven-safe skillet) over medium-high heat and add the oil.
Season the salmon fillets on both sides with salt and pepper and add to the hot pan, top side down.
Let the salmon brown until it's caramel-coloured on the first side (about 2 minutes) and then flip to brown on the other side.
While the salmon is browning, whisk together the maple syrup, soy sauce, sesame oil, garlic, ginger and Sriracha in a small bowl and pour it over the salmon fillets.
Add the whole pan to the preheated oven, uncovered, and cook for about 7-10 minutes, or until the salmon is cooked through to an internal temperature of 145 degrees Fahrenheit (63 degrees Celsius) and flakes easily with a fork.
Spoon the maple glaze over the salmon again before serving. Garnish with sesame seeds and chopped chives, if desired.