“SERVES 6 TO 8 AS AN APPETIZER     Two 10-ounce packages large white stuffing mushrooms (about 24 mushrooms) ½ cup finely chopped scallions (about 4) ¼ cup finely chopped red bell pepper ¼ cup fine dry bread crumbs 6 tablespoons grated Grana Padano or Parmigiano-Reggiano 3 tablespoons chopped fresh Italian parsley ¾ teaspoon kosher salt ¼ cup extra-virgin olive oil ½ cup dry white wine 3 tablespoons unsalted butter, softened”