Inventure Foods Inc. has issued a voluntary recall of three of its products because they may have been contaminated with Listeria monocytogenes, an organism that can cause serious and sometimes fatal infections in young children, frail or elderly people, and others with weakened immune systems. The Phoenix-based snack-foods maker recalled its Radar Farms Fresh Start Smoothie Blend, Fresh Start Sunrise Refresh Fusion and Fresh Start Daily Powder Fusion, according to a U.S. Food and Drug Administration alert .