Set an oven rack in the middle position of the oven and pre-heat to 450°F.
Line a baking sheet with aluminum foil for easy cleanup; spray with non-stick cooking spray.
In a small bowl, whisk together the mustard, melted butter, honey, ½ teaspoon salt and pepper; set aside.
In another small bowl, mix together the panko, pecans, parsley and remaining ¼ teaspoon salt.
Spoon the honey-mustard mixture evenly over the salmon fillets.
Sprinkle the panko-pecan mixture over the glaze, pressing it lightly so it adheres.
Place in pre-heated oven and bake for 7 to 10 minutes per inch of thickness, depending on how well done you like salmon.
If the topping is browning more than you like, before the fish is cooked through, loosely cover the salmon with foil.
Remove from the oven and serve hot or at room temperature.