A Queens woman has just joined the growing family of New Yorkers who've found foreign objects in their fast food. Last week a man found a serrated knife in his Subway sandwich, now a 25-year-old Julisa Caba says she discovered a metal screw when she bit into a McDonald’s apple pie. A Health Department spokesman tells the Daily News, “The McDonald's [on 21st Street in Astoria] will receive a full sanitary inspection, with additional focus......