Add the apples to the slow cooker and sprinkle them with the ground cinnamon. Add the lemon juice and enough water to reach about 2 inches in height.
Cook on 'high' for 3-4 hours, or until apples are fairly soft.
In a blender or food processor, combine the pitted dates, sea salt, vanilla and almond extract (if using) and non-dairy milk.
Add the cooked apples and blend until completely smooth. Add more of the cooking juice from the apples if needed to blend.
Return to the slow cooker and cook on high for another 1-2 hours, or until desired thickness is reached.
Notes
I used a mixture of about two thirds red apples and one third green apples.If you can't get Medjool dates, you can use Deglet Noor or other dried dates, but you might want to increase the amount.