01 - Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper or lightly grease it with oil.
02 - In a small bowl, whisk together the maple syrup, Dijon mustard, olive oil, lemon juice, salt, and pepper until smooth and well combined.
03 - In a separate bowl, combine the chopped pistachios, panko breadcrumbs (if using), lemon zest, and parsley. Toss to distribute evenly.
04 - Pat the salmon fillets dry with paper towels and arrange them on the prepared baking sheet, spaced apart.
05 - Using a pastry brush, generously coat the top and sides of each salmon fillet with the maple-mustard glaze.
06 - Gently press the pistachio mixture onto the glazed surface of each fillet, building an even, adherent crust.
07 - Bake in the preheated oven for 15 to 20 minutes, until the salmon is opaque throughout and flakes easily with a fork, and the crust is golden brown.
08 - Transfer to plates and serve immediately alongside your choice of roasted vegetables, quinoa, or a fresh green salad.