And it has to do with that white stuff on the cheese. GMVozd/Getty Images If you’ve ever topped a lasagna with pre-shredded cheese ... it’s best to use a food processor or cheese grater ...
And if you’re unsure, it’s best to err on the side ... and it’s time to throw the cheese in the trash. How to Store Soft, Hard, and Shredded Cheese How do you prevent a cheese from molding?