Not on the ingredient list

A U.S. food manufacturer has recalled more than 350,000 pounds of food produced at a Texas plant for fear the items may contain shards of glass. Schwan's Food Manufacturing is, according to reports, cooperating with the FDA in the recall of thousands of frozen egg rolls, pizzas and other frozen food items.

An initial recall following the discovery of glass in food was initiated in January; a subsequent recall was triggered by the discovery of more glass in products not on the original list. Some of the food items were believed to have been served in schools, according to this MSNBC article, whch also includes a list of affected foods.