Preheat the oven to 400º F and spray a large baking dish with a bit of cooking oil spray.
Place the 4 skinless salmon filets on the prepared baking dish and season with 1/2 teaspoon kosher salt and 1/4 teaspoon freshly ground black pepper.
In a small bowl combine the 1 tablespoon dijon mustard with 2 tablespoons lemon juice, 1 teaspoon lemon zest, and brush the salmon on all sides with this mixture. This will help the pistachio coating to stick to the salmon.
In a small food processor, add the 1 cup shelled roasted pistachios, 1/4 cup shaved parmesan, 1 teaspoon Italian seasoning, and 1/2 teaspoon garlic powder Pulse until mostly grounded.
Evenly spread the pistachio mixture over the salmon filets and gently press to help it adhere. Bake for 10-12 minutes, or until flaky.
Serve with lemon wedges and Greens if using.
Notes
Use skinless or skin-on salmon
If possible use while-caught salmon.
Don't like pistachio, use any other nuts like almonds, pecans, or walnuts.