Directions: In a large bowl, combine the blueberries, sliced apples, sugar, orange juice, and cornstarch. Pour the mixture into an 8x8x2 glass baking dish. Place in a 375 degree oven and bake for 45 minutes until the fruit softens and begins to bubble. In a large mixing bowl, combine the flour and sugar. Add the cut butter to the bowl. Use a pastry blender or hands to combine the mixture to create coarse crumbs. Sprinkle the mixture over the cooked filling and continue to bake for 30 minutes until the topping is crisp.