In a 3-4 quart slow cooker, combine peaches with maple syrup, lemon juice and vanilla.
In a medium size bowl, mix flour, oats, brown sugar, cinnamon, nutmet, and salt.
Cut in butter until mixture resembles coarse crumbs.
Sprinkle oat mixture over peaches in crock pot and press down slightly.
Cover the crock pot with a paper towel. Put the lid over the paper towel.
Cook on HIGH for two hours.
Serve with vanilla ice cream.