Directions

1. In a food processor, combine the flour, 1/2 cup sugar and butter. Cover and pulse until blended. Add eggs; pulse until blended. On a lightly floured surface, gently knead dough 5 times or until a ball is formed.
2. Between two sheets of waxed paper, roll two-thirds of dough into a 13-in. circle; press onto the bottom and 2 in. up the sides of an ungreased 9-in. springform pan. Cover and chill. Roll remaining dough into a 9-in. circle; chill.
3. In a large heavy skillet, cook and stir the remaining sugar over medium heat until melted and dark brown, about 20 minutes. Slowly stir in cream until blended. Remove from the heat; stir in nuts. Cool for 15 minutes. Pour into prepared pan. Top with 9-in. pastry circle. Fold pastry from sides of pan over the top pastry; seal edges with a fork. Brush top with egg white.
4. Bake at 325 degrees F for 50-55 minutes or until golden brown. cool on a wire rack for 20 minutes. Carefully run a knife around edge of pan to loosen. Remove sides of pan. Cool completely before cutting.