Thaw pastry sheet at room temperature 30 minutes. Preheat oven to 400 degrees F.
Mix egg and water.
Unfold pastry on lightly floured surface.
Roll into 14-inch square.
Cut off corners to make a circle.
Sprinkle almonds and parsley in center of circle. Top with cheese.
Brush edge of circle with egg mixture. Fold two opposite sides over cheese. Trim remaining two sides to 2 inches from edge of cheese. Fold these two sides onto the round. Press edges to seal.
Place seam-side down on baking sheet. Decorate top with pastry scraps if desired.