HEAT oven to 400 degrees F. Unfold puff pastry on a lightly floured surface. Roll gently to seal any cracks in pastry. Spoon preserves onto center of pastry. Place cheese on top of preserves. Sprinkle evenly with nuts. Fold pastry up over the cheese to cover. Trim excess pastry and press to seal seams. Reserve pastry scraps.
WHISK egg and water in small bowl. Brush seams with egg mixture. Place seam-side down on baking sheet. Cut pastry scraps into decorative shapes and arrange on top, if desired. Brush with egg mixture.
BAKE 25 minutes or until golden brown. Let stand 20 minutes before cutting. Serve with crackers and sliced fruit.