Yield: 6 servings
Preheat oven to 400 degrees F
Mix 1/2 cup sugar and cornstarch in a medium saucepan; stir in blueberries and water; heat to boiling, stirring constantly; boil and stir for 1 minute.
Pour into greased 1 1/2- quart casserole dish.
Mix 1/3 cup sugar and flour; cut in butter with knife or fork. Sprinkle over blueberry mixture.
Bake for about 15 minutes until golden brown.
Serve warm topped with ice cream or frozen yogurt.
Please note that some ingredients and brands may not be available in every store.