In a cast iron skillet or oven safe pan, place the blueberries evenly on the bottom.
In a small bowl, mix together the sugar, flour, cinnamon, and nutmeg. Place this evenly over the blueberries.
Pour the water right on top.
Sprinkle additional cinnamon on top.
In another bowl or in that same bowl, combine the oats, flour, brown sugar, baking powder, and baking soda. Mix in the melted butter until the mixture is crumbly.
Crumbly the mixture evenly over the blueberries.
Bake for 45 minutes or until browned on top.
Serve warm with vanilla ice cream.
Notes
As always be sure to check all ingredients to make sure they are gluten-free as many are different. Also, you can make this with a variety of fruits.