Italian Sesame Cookies

My Grandfather’s favorite cookie , Sesame Seed Cookies !
Ingredients
1/2 cup (1stick) butter in small cubes
1 cup sugar
3 cups flour
1 tsp vanilla extract
1/2 tsp dried or fresh lemon zest
1/4 cup milk
3 cups toasted sesame seeds
3 eggs ( seperated )
2 tsp baking powder
1/2 tsp baking soda
1/2 tsp salt
combine flour , sugar , lemon zest , baking powder and soda , salt and butter and mix well by hand
then add The lightly beaten egg yolks , milk and vanilla and kneed well into a ball of dough…Wrap it well in plastic wrap and refrigerate for 1 hour
remove after 1 hour and cut the dough ball into 8 equal pieces ..Roll each piece to 6 inches long and 3/4 inch thick .. cut into
1 1/2 inch long pieces
dip pieces in the beaten egg whites and roll completely in seeds … place on parchment lined cookie sheets and bake for 30 minutes at 350, spin and rotate 1/2 way through