A food service supplier has issued a recall for onions from a Colorado Springs Taylor Farms facility due to possible E. coli contamination, according to a letter provided to 9NEWS by the restaurant chain Illegal Pete's. The move by US Foods comes after an outbreak of E. coli that has sickened dozens of people and is blamed for the death of one person in Mesa County. According to health officials, it has been linked to McDonald's Quarter Pounders. The outbreak's exact source is unknown, but the focus has been on slivered onions and the beef patties specifically used by the chain for those burgers. Read more at: https://www.9news.com/article/news/local/onion-recall/73-d8606a18-85b2-4792-8be7-f4790794c17c More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.