01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or lightly grease it with olive oil.
02 - In a small mixing 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 roughly chopped pistachios, panko breadcrumbs (if using), lemon zest, and fresh parsley. Toss until evenly distributed.
04 - Pat the salmon fillets dry with paper towels and arrange them on the prepared baking sheet, spacing them evenly apart.
05 - Using a pastry brush, generously coat the top and sides of each salmon fillet with the maple-mustard glaze.
06 - Press the pistachio mixture firmly onto the glazed surface of each fillet, creating an even, adhered crust layer.
07 - Bake on the center rack for 15 to 20 minutes, until the salmon is opaque throughout, flakes easily with a fork, and the crust is golden brown.
08 - Transfer the fillets to serving plates immediately. Pair with roasted vegetables, quinoa, or a fresh green salad.