Vanilla Walnut Crescents

In a large bowl, combine flour and salt; cut in butter until mixture resembles coarse crumbs. In a small bowl, whisk the egg yolk, sour cream and vanilla; add to crumb mixture and mix well. Cover and refrigerate for 4 hours or overnight.

Divide dough into thirds. On a lightly floured surface, roll each portion into a 10-in. circle.

Combine the walnuts, sugar and cinnamon; sprinkle 1/4 cup over each circle.

Cut each circle into 12 wedges.

Roll up each wedge from the wide end and place point side down 1 in. apart on greased baking sheets. Curve ends to form crescents.

Whisk egg white until foamy; brush over crescents.

Sprinkle with remaining nut mixture.

Bake at 350° for 18-20 minutes or until lightly browned.

Remove to wire racks to cool. Store in an airtight container.