In large bowl, break up cookie dough. Stir or knead in flour until well blended. Sprinkle work surface with additional flour; coat all sides of dough with flour. With rolling pin, roll dough to 1/8-inch thickness, adding flour as needed to prevent sticking. With floured 3-inch round cutter, cut out 16 dough rounds, rerolling scraps as needed. Spoon about 1 tablespoon apple filling onto center of 8 dough rounds; top with remaining 8 dough rounds. Press edges with fork to seal. Place 2 inches apart on ungreased cookie sheets. Sprinkle with cinnamon-sugar.