“As we continue to monitor the recently reported E. coli outbreak, and out of an abundance of caution, we have proactively removed fresh onions from select Taco Bell, Pizza Hut and KFC restaurants,” Yum Brands said. “We will continue following supplier and regulatory guidance to ensure the ongoing safety and quality of our food.”

Decision to cut topping comes as officials work to confirm source of bacteria linked to McDonald's Quarter Pounders.

Taylor Farms also issued a recall on its peeled, diced and whole peeled yellow onion packs “due to potential E.Coli contamination”