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.
Causes of E. coli infection. Although most strains of E. coli are harmless, some produce a toxin that makes humans sick. There are several types of toxins; the group that includes 0157:H7 produces a potent toxin called Shiga toxin that is harmful to the lining of the small intestine.