Lick My Spoon | Prosciutto, Brie and Apple Panini with Scallion Butter

Ingredients

• 4 tablespoons plus 2 teaspoons unsalted butter, softened
• 1 scallion, finely chopped
• 1/2 teaspoon fresh lemon juice
• 1/4 teaspoon Dijon mustard
• 4 soft hero or ciabatta rolls, or 1 long baguette, halved lengthwise
• 3/4 pound thinly sliced prosciutto
• 1/2 pound Brie, rind removed, cheese cut into 4 pieces
• 1 large Granny Smith apple, peeled, cored and thinly sliced