Place a glass bowl on the inside of a slow cooker, you are making a double boiler.
Pour water into the crock pot (not in the glass bowl) until it is half way up the outside of the glass bowl.
Mix all ingredients in the bowl (milk, 1 cup water, oats, butter, honey, flax seed, apple pie spice and salt.)
Cook on low for 6-8 hours.
Stir well and top with desired toppings.