In a pot, mix 3 cups of blueberries, sugar, flour, water, lemon juice, and vanilla. Stir on low to medium heat.

Let it come to a boil, then simmer for 10 minutes.

Put the mixture in baking dish, and roll out the dough to lay on top.

Bake at 450° till light brown.

Let cool a bit, serve with vanilla ice cream. Enjoy :)