Slip off skins. Cut in half and remove pits. Drop into water with ascorbic acid. Drain and place into syrup, juice, or water. Bring to boil.
Fill jars with hot fruit and hot liquid, leaving headspace.
Wipe rims, adjust lids, and process. Fill jars with raw fruit, cut side down. Add hot water, juice, or syrup leaving head-space. Wipe rims, adjust lids, and process. Cut lengthwise in halves.