Preheat the oven to 400°F (200°C). Line a large rimmed baking sheet with parchment paper.
Pat the 1 1/2 pound whole salmon fillet (skin on) dry with paper towels and place skin-side down on the prepared baking sheet. Season the top of the salmon with kosher salt and freshly ground black pepper to taste. Set aside.
In a small bowl, whisk together 1 tablespoon fresh lemon juice, 2 teaspoons olive oil, 2 teaspoons honey, 1 teaspoon Dijon mustard, and 1 clove fresh garlic (minced) until smooth.
In a separate small bowl, combine 1/4 cup panko, 1/3 cup crushed pistachios, 2 tablespoons freshly grated Parmesan cheese, and the zest of 1 lemon. Mix to distribute evenly.
Drizzle the lemon-honey mixture evenly over the top of the salmon (some may run off onto the parchment). Use a spoon or brush to spread it over the top surface.
Sprinkle the pistachio-panko mixture evenly over the sauced top of the salmon, then gently press the mixture down so it adheres to the fish.
Place the baking sheet on the center oven rack and bake 10 to 14 minutes, depending on the thickness of the fillet, until the salmon flakes easily with a fork and an instant-read thermometer inserted into the thickest part reads 125–130°F.
Remove the salmon from the oven, let rest 1–2 minutes to set the crust, then serve immediately with lemon wedges, if desired.