Freezing Food
Another common method of packaging food is freezing, according to Julie Garden-Robinson of North Dakota State University. Freezing can be done with a variety of methods. Most often, it is vegetables that are frozen, although berries and other fruits can also lend themselves to being frozen. When freezing vegetables, make sure that they are thoroughly clean and cooked if that is appropriate. Certain vegetables are not good candidates for freezing. For example, tomatoes do not stand up well to freezing unless they are cooked and pureed. Corn stands up well to freezing without being precooked. In order to preserve the food completely, make sure that the package is airtight to prevent freezer burn which can ruin the food