1
: Let folded pastry thaw at room temperature for 20 minutes. On a lightly floured surface, unfold pastry; roll out into 15x10" (40 x 25 cm) rectangle. Cut a ¾ inch (1.87 cm) wide strip from each short end of rectangle. Set aside the 4 strips.
2
: Place pastry rectangle onto ungreased baking sheet. Brush with egg white. Lay pastry strips on top of pastry rectangle, aligning outer edges of strips with outer edges of rectangle; trim strips to fit. Brush strips with egg white and sprinkle with sugar. Prick bottom of rectangle several times with fork.
3
: Bake in a preheated 375°F (190°C) oven 20-25 minutes or until light brown. Cool.
4
: Combine Eagle Brand, lime juice and sour cream. Spoon into cooled pastry rectangle. Cover and chill for up to 4 hours. Top with berries before serving. Store leftovers covered in refrigerator.