Unfold 1 pastry sheet on a lightly floured surface. Roll the pastry sheet into a 15x10-inch rectangle. Cut lengthwise into 3 (5x10-inch) rectangles. Brush the pastry rectangles with the egg. Repeat with the remaining pastry sheet.

With the short side facing you, spread about 1 tablespoon cream cheese on the bottom half of each pastry rectangle. Top each with 3 slices ham, about 2 tablespoons arugula and 2 slices nectarine. Fold the pastries in half over the filling and press the edges to seal.

Heat the panini maker. Add the pastries, one at a time, and cook for 5 minutes or until the pastry is golden brown and the cheese is melted.

Double Berry Paninis: Omit the ham, arugula and nectarine. Prepare the pastry rectangles as directed above. With the short side facing you, spread about 1 tablespoon cream cheese on the bottom half of each pastry rectangle. Top each with 2 teaspoons strawberry jam, about 5 raspberries or blueberries and 1 tablespoon toasted almonds. Fold and cook as directed above. Sprinkle with confectioners' sugar before serving.