Kosher For Passover
"During Passover (also known as Pesach), Jewish people avoid anything that contains grain that has risen or fermented—including breads, pastas, beers, liquors and more. In order for something to be kosher for Passover, even the minutest amount of the forbidden substance, known as chametz, is a problem. Dishes must be scoured and purged from any trace of non-Passover food before food that is kosher for Passover can be produced on them."