3 1/4 c. all-purpose flour
1 c. plus 2 tbsp. butter, cut into sm. pieces
1/2 c. plus 1 tbsp. sugar
6 egg yolks
A pinch of salt
A grated peel of 1/2 lemon
Sugar crystals

Grease baking sheets. Sift flour in a large bowl; dot with butter. Make a well in center of flour; add granulated sugar, 5 egg yolks, salt and lemon peel. Knead ingredients to make smooth dough. Place in pastry bag fitted with a plain nozzle. Pipe "S" shapes at equal intervals onto greased baking sheets. Refrigerate for 1 hour.

Preheat oven to 375 degrees (190 C). Beat remaining egg yolk and brush over cookies. While the egg yolk and the cookies are moist, sprinkle with sugar crystals. If any sugar falls onto baking sheets, remove with a damp pastry brush to avoid burning. Bake 8-10 minutes or until golden. Cool on baking sheets for about 5 minutes. Remove from sheets with a spatula; cool completely on a rack.