Roast the vegetables. Place the baking sheet with the vegetables into your preheated oven, on the middle or top rack. Roast for 15 minutes to an hour, depending on the vegetable. The vegetables are done when they are cooked through, the centers soft and creamy and the outer edges golden and crispy.
E. coli O157:H7 first became a household name during an outbreak in the western U.S. that began in late 1992, and lasted into 1993. The E. coli outbreak was linked to the consumption of hamburgers served by the Jack in the Box Restaurant chain.
1 Bloody diarrhea from an E. coli O157:H7 infection typically begins 3-4 days after exposure, although it may occur as soon as 24 hours or as late as 1 week.  Diagnosing a serious E. coli infection is fairly straightforward and involves sending a stool sample to a laboratory for testing and culture.