I don't know how many people really do home canning, but I have to post this recipe, because it is SO GOOD.
3 quarts finely chopped, peeled, cored apples (about 6 pounds)
6 cups sugar (I used sweet apples, so I cut this in half)
1 teaspoon cinnamon
1/2 teaspoon allspice
1/2 teaspoon nutmeg
1/4 teaspoon ground cloves
1 cup pure maple syrup (do NOT use flavored pancake syrup!)
Combine all ingredients in a large saucepan. Bring slowly to a boil, then cook rapidly to gelling point. As mixture thickens, stir frequently to prevent sticking. Ladle hot jam into hot jars, leaving 1/4-inch headspace. Adjust two-piece caps. Process 10 minutes in a boiling-water canner.
Yield: about 8 half-pint jars.
And if you've never done canning and want to learn, check out http://www.homecanning.com/ - it's not nearly as difficult or involved as you'd think, and you can make some seriously delicious stuff that you'd never find in a store.