By: Beth Mole
photo of Taco Bell, KFC, Pizza Hut, Burger King pull onions amid McDonald’s outbreak image Big-name fast food chains, including Taco Bell, KFC, Pizza Hut, and Burger King, are reportedly pulling onions off their menus in certain locations amid a deadly, multistate outbreak of E. coli O157:H7 linked to McDonald's Quarter Pounders. Though the source of the outbreak bacteria has not been confirmed by…