This is very easy and great served with vanilla ice cream. The perfect summer combination.
5 cups ripe fresh blueberries, washed
3/4 cup brown sugar
1/2 cup flour
3/4 cup rolled oats
1/2 cup butter, softened
1/2 teaspoon cinnamon
Heat oven to 375°. Place blueberries in a 13x9 baking dish and set aside.Stir remaining ingredients in a bowl until well combined. Sprinkle mixture over berries. Bake until golden brown about 30-40 minutes.
I must give credit where credit is due and say that I found this recipe at Fried Okra's blog.