Is it nessesary to cover a casserol when putting away in the fridgerator?

Yes, it is necessary to cover a casserole when putting it away in the refrigerator. Covering the casserole prevents air from circulating throughout the dish, which helps to preserve the quality and flavor of the food. It also helps to prevent the contents of the casserole from drying out and becoming tough. Additionally, covering the casserole helps to protect it from absorbing other flavors and odors from the refrigerator. A plastic wrap and foil should be tightly fastened.