Add hot water, juice, or syrup leaving head-space. Wipe rims, adjust lids, and process. Cut lengthwise in halves. Drop in ascorbic acid solution until ready. Boil in water, apple juice, white grape juice or desired syrup 5 minutes.
Fill jars with hot fruit and hot liquid, leaving headspace.
Wipe rims, adjust lids, and process. Slice or cube. Simmer 10 minutes in water, juice, or syrup. Fill jars with hot pineapple and hot liquid, leaving headspace. Wipe rims, adjust lids, and process.