5-6 large apples (I use fuji, gala, or pink lady, but you can use any type you like)
1/4 cup water
1 tablespoon cinnamon
2 tablespoons sugar (optional)
For baby food puree: Peel, core, and slice apples into equally-sized pieces. Add to the crock pot with the rest of the ingredients. I would leave out the sugar for babies unless you are using tart apples like granny smith. I had a half of a bag of granny smith apples leftover after making my Thanksgiving pies, so I used those with a couple of fuji apples, and my daughter gobbled them up even without sugar. Cook on low heat for 6-8 hours stirring every 30 minutes or so (although I've done this without stirring very often, and it works just fine). Remove from the crock pot, puree, and freeze in ice cube trays overnight.
For chunkier sauce: Instead of pureeing, use a pastry blender or Mix N Chop to crush apples into a chunky consistency.
For finger food for older babies: Instead of slicing the apples, dice them into finger food-sized pieces. They will not take quite as long to cook, so check them every once in awhile so they don't completely turn to mush. When they're cooked through, spoon the apple cubes into an ice cube tray and freeze overnight.