Step 1

Quarter and core the apples.  (Peel if desired, but it's not necessary.)Alternatively: Skip coring, and use a food mill to remove the seeds before blending the apples (in step 3).

Step 2

Add the apples, water, sugar, and lemon juice to the basin of a slow cooker.

Step 3

Cook on high for about 2 hours, until the apples begin to break down.  Use an immersion blender and blend the sauce.Alternatively: Ladle the apples into a regular blender or food processor, and then return it to the slow cooker.

Step 4

Continue to cook the sauce for another 5-6 hours on high, until the apple mixture is thickened and golden brown.  (Total cook time will be 7-8 hours.)

Step 5

Add cinnamon.  Taste, and add more sweetener if desired.

Step 6

Store in the refrigerator for up to a month or freeze for up to 6 months.