Toasted Pistachio-Cheese Arancini

Toasted Pistachio-Cheese Arancini Ingredients 2 1/2 tablespoons unsalted butter 1 small onion, minced 1 1/2 cups arborio rice (about 10 ounces) 1/2 cup dry white wine Pinch of saffron threads, crumbled Salt and freshly ground black pepper 3 cups chicken stock or low-sodium broth, warmed 3 tablespoons freshly grated Parmigiano-Reggiano cheese 1/2 tablespoon all-purpose flour, plus more for dusting 1/4 cup plus 2 tablespoons milk Pinch of freshly grated nutmeg 4 ounces fresh mozzarella, finely diced 1/4 cup plus 2 tablespoons chopped salted pistachios 2 tablespoons frozen baby peas, thawed 2 large eggs, beaten 1 1/2 cups panko (Japanese bread crumbs) Vegetable oil, for frying Directions In a large saucepan, melt 2 tablespoons of the butter. Add the onion and cook over moderate heat, stirring, until lightly browned, 7 minutes. Add the rice and cook, stirring, until well coated with butter. Add the white wine and saffron, season with salt and b...