"Jam" redirects here. For other uses, see Jam . Fruit preserves refers to fruit, or vegetables, that have been prepared, canned or jarred for long term storage. The preparation of fruit preserves traditionally involves the use of pectin. There are various types of fruit preserves made globally, and they can be made from sweet or savory ingredients. History The Greek technique of preserving quinces by boiling them in honey was included in the Roman cookery book De re coquinaria. Th