Heat oven to 350. Grease square pan, 9 x 9 x 1.75. Mix flour, sugar, salt, egg yolks, butter and lemon rind. Divide mixture in two parts; press one part in bottom of greased pan. Mix applesauce, cinnamon, cloves and spread on top of dough in pan. Sprinkle rest of dough over applesauce. bake 40-45 minutes or until it tests done. Serve warm topped with whipped cream, Ice cream or lemon sauce. ----