For pistachio gremolata, in a small bowl combine the first seven ingredients (through 1/8 teaspoon salt).
In a very large skillet heat 1 Tbsp. olive oil over medium-high heat. Season salmon with 1/4 tsp. each salt and pepper. Carefully place salmon in skillet. Cook 3 minutes. Turn and cook 3 minutes more or just until salmon flakes. Top with pistachio gremolata.