Quarter apples. Put them into a large pot, add vinegar and water, cover, bring to a boil, reduce heat to a simmer, and cook until apples are soft, about 20 minutes.
Remove from heat. Ladle apple mixture into a chinois sieve or food mill and force pulp into a large bowl.
Measure resulting puree. Add 1/2 cup sugar for each cup of apple pulp. Stir to dissolve sugar. Add a dash of salt, cinnamon, cloves, allspice, lemon rind and juice. Taste and adjust seasonings if necessary.
Cook uncovered in a large, wide, thick-bottomed pot over medium-low heat, stirring constantly to prevent burning, until thick and smooth when a bit is spooned onto a cold plate and allowed to cool, about 1 to 2 hours. Alternatively cook on low heat, stirring occasionally, for longer.
Pour into hot, sterilized jars and seal. The source says to use a hot-water bath for 10 minutes for unrefrigerated storage.
2cupspearsfinely chopped, peeled and cored (about 2 lb)
1cupapplesfinely chopped, peeled and cored (about 1 lb)
6 1/2cupssugar
1/4tspcinnamon
1/3cuplemon juice
6ozliquid pectin
Instructions
Crush apples and pears in a large saucepan and stir in cinnamon.
Thoroughly mix sugar and lemon juice with fruits and bring to a boil over high heat, stirring constantly.
Immediately stir in pectin. Bring to a full rolling boil and boil hard 1 minute, stirring constantly.
Remove from heat, quickly skim off foam, and fill hot, sterile jars leaving 1/4-inch headspace. Adjust lids and process in a boiling water bath for 5 minutes.
To sterilize empty jars, place them right side up on the rack in a boiling-water canner. Fill canner and jars with hot (not boiling) water to 1 inch above jar tops. Boil 10 minutes below 1,000 feet elevation, adding 1 minute for each additional 1,000 feet. Remove and drain hot sterilized jars one at a time as filled.