In a large bowl, mix cold butter into flour until the mixture has a crumb-like texture. Make a well in the center and add cold water. Mix together until it forms a ball and then chill the dough.

Preheat oven to 450°F and grease cookie sheet(s)

In a medium bowl blend together the almond paste, eggs, sugar, almond extract and salt.

Divide the dough into 4 parts and roll into 15 inch strips. Place the filling along the center of each long strip, roll up and pinch the ends to seal.

Place the strips 2 inches apart on the cookie sheet and brush each with egg white and sprinkle sugar on top.

Bake for 15 - 20 minutes or until golden brown.