Preheat oven to 400 degrees F. Lightly grease a large baking sheet or shallow baking pan. Place salmon on sheet and sprinkle with salt and pepper.
In a small saucepan, melt butter over low heat. Stir in the Dijon mustard and maple syrup. Spread evenly over top of salmon.
In a small bowl combine the pecans and parsley. Sprinkle over top of salmon.
Bake for 10 to 15 minutes, or until salmon flakes easily with a fork. Note: if using a baking sheet, instead of a pan, the salmon might cook a little faster, so keep an eye on it.