1. Preheat oven to 425 degrees and grease a small casserole dish. (Not a 9X13, something smaller, like a 2 qt. pan)

2. Combine blueberries, sugars, lemon juice, lemon zest and cornstarch.

3. Pour into pan and bake for 10 minutes.

4. While baking the blueberries, in a large bowl combine flour, sugars, baking soda, salt and cinnamon. Add butter and use a pastry cutter to combine until mixture resembles coarse meal. Add water and stir until combined.

5. Cover blueberries with topping and sprinkle cinnamon-sugar over the top if desired.

6. Bake for about 30 minutes or until topping is done.

7. Serve warm with vanilla ice cream.