Step 1: Preheat oven to 400. Line a baking sheet with parchment paper and set aside. Pulse 1/2 cup shelled pistachios in a food processor until fine. Transfer to a large bowl and add 1/4 cup all-purpose flour, 1 tsp salt, 1/2 tsp black pepper, 1 tsp lemon zest, 1/4 tsp cayenne pepper, 1/4 tsp paprika, and 1 tsp garlic powder. Mix well and set aside. Add another 2 c. shelled pistachio halves to the food processor and pulse into large pieces. Step: 2 In a medium-sized bowl whisk together 2 lg eggs and 1 tbsp olive oil until well combined; set aside. Coat each salmon fillet in the flour/pistachio mixture, shaking off any excess. Dip it in the egg/oil mixture. Finally, generously roll it in the coarsely chopped pistachios. Place the salmon fillets, a few inches apart, on the prepared baking sheet. Step 3: Bake for approx nine minutes, turn each piece over and bake for approx nine more minutes, or until the outside is crisp and the center is cooked to your liking.