Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a bowl, combine chopped walnuts, maple syrup, Dijon mustard, and olive oil until the walnuts are well-coated.

Place salmon fillets on the prepared baking sheet, drizzle lightly with olive oil, and season with salt and pepper.

Generously top each fillet with the walnut mixture.

Bake for 12-15 minutes or until the salmon flakes easily with a fork.

Let rest briefly before serving with steamed veggies or rice.