Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper or foil and lightly spray or grease it.
Pat the salmon fillets dry with paper towels and place them skin-side down on the prepared baking sheet, spaced evenly.
In a small bowl, whisk together the softened butter, honey, and sesame oil until smooth; season with salt and pepper to taste.
Spread a thin layer of the honey-butter mixture over the top of each salmon fillet.
Bake the salmon in the preheated oven for 10–12 minutes, or until the fish is just cooked through and flakes easily with a fork.
Remove from the oven and, if using, sprinkle sesame seeds and chopped parsley over the fillets before serving immediately.