2. In a large bowl, combine blueberries, sugar, and cornstarch; toss to coat. Add bread cubes and melted butter; mix well then spoon into prepared baking dish and sprinkle with cinnamon.
3. Bake 35 to 40 minutes, or until bubbly and bread is golden. Serve warm.
For a totally awesome dessert, serve this with fresh whipped cream made simply by beating 1 cup (1/2 pint) heavy cream with 2 to 3 tablespoons confectioners' sugar until stiff peaks form.