01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - Pat the salmon fillets dry and season with salt and pepper. Place them on the prepared baking sheet.
03 - In a food processor, combine pistachios, parsley, dill, chives, lemon zest, garlic, and sea salt. Pulse until coarsely chopped. Add 2 tbsp olive oil and pulse again until the mixture starts to clump together.
04 - Brush the top of each salmon fillet with Dijon mustard. Press the pistachio-herb mixture evenly onto the mustard-coated side of each fillet.
05 - Drizzle 1 tbsp olive oil over the crusted salmon. Bake for 12–15 minutes, or until the salmon is just cooked through and the crust is golden.
06 - Meanwhile, in a large bowl, toss the spring greens, radishes, sugar snap peas, and feta (if using) with olive oil, lemon juice, salt, and pepper.
07 - To serve, plate the spring greens salad and top with a pistachio herb crusted salmon fillet. Serve immediately.