01 - Preheat oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - In a small mixing bowl, whisk together the maple syrup, Dijon mustard, olive oil, lemon juice, salt, and pepper until well combined.
03 - In a separate bowl, combine the chopped pistachios, panko breadcrumbs (if using), lemon zest, and parsley. Toss until evenly mixed.
04 - Pat the salmon fillets dry with paper towels and arrange them on the prepared baking sheet.
05 - Generously brush each salmon fillet on all exposed sides with the maple-mustard glaze using a pastry brush.
06 - Press the pistachio mixture firmly onto the top of each glazed fillet, forming an even, adhered crust.
07 - Bake for 15 to 20 minutes, or until the salmon is opaque throughout and flakes easily with a fork, and the crust is golden brown.
08 - Remove from the oven and serve immediately alongside your choice of roasted vegetables, quinoa, or a fresh green salad.