Butterflied Shrimp with Pistachios and Orange-Saffron Vinaigrette

Ingredients

• 1 cup fresh orange juice
• 1 tablespoon minced shallot
• 1/4 teaspoon saffron threads
• 2 tablespoons Champagne vinegar
• 1/4 cup extra-virgin olive oil
• Kosher salt
• 1/4 cup unsalted pistachios
• 8 head-on shrimp (1 pound), butterflied through the shells
• Kosher salt
• Pepper
• 1/4 cup extra-virgin olive oil
• 8 large scallions, cut into 2-inch pieces (2 cups)
• Pistachio oil, for drizzling

Steps

1. In a small saucepan, combine the orange juice, shallot and saffron. Bring to a simmer and cook over moderate heat until reduced to 1/4 cup, about 25 minutes. Transfer to a small bowl and let cool completely. Whisk in the vinegar and oil and season with salt.
2. Preheat the oven to 375°. Spread 2 tablespoons of the pistachios in a pie plate and toast for 5 minutes or until golden; coarsely chop. In a spice grinder, finely grind the remaining 2 tablespoons of pistachios. Season the flesh side of the shrimp with salt and pepper and coat with the finely ground pistachios.
3. In a large nonstick skillet, heat 2 tablespoons of the olive oil. Add the scallions and cook over moderately high heat, stirring, until lightly charred and just tender, about 3 minutes. Transfer to a plate.
4. Wipe out the skillet and heat the remaining 2 tablespoons of olive oil in it. Add the shrimp, flesh side down, and cook over moderate heat, turning once, until just white throughout, about 3 minutes. Transfer the shrimp to plates. Spoon some of the vinaigrette over the shrimp and top with the scallions, a drizzle of pistachio oil and the chopped pistachios. Serve the remaining vinaigrette on the side.