Jan Hagel

1 cup butter, cold and diced up
1 cup sugar
1 egg, separated
2 cups flour
1/2 teaspoon cinnamon
1 tablespoon water
1/2 cup very finely chopped walnuts or pecans or almonds

Preheat oven to 375 degrees.
Line a 10 x 15 baking pan with parchment that sticks up a bit.
Combine the dry ingredients in a food processor.
Add the egg yolk and mix well.
Add the chilled diced butter and mix until like cornmeal.
Dump the mixture into the pan, spread around evenly, and pat down.
Combine the egg white and the water and mix until frothy.
Spread over the dough and sprinkle on the nuts.
Bake for about 20 to 25 minutes.
Remove promptly from the pan, lifting by the excess parchment that is sticking up, and place onto a cutting board. Cut into strips, or any shape you like. A pizza cutter can be handy here. The reason for lifting out of the pan is because cutting the cookies in the pan ruins the pan.