Combine first 6 ingredients in a medium bowl; spoon into an 11 x 7-inch baking dish.
Lightly spoon flour into a dry measuring cup, and level with a knife. flour, brown sugar, oats, and cinnamon, and cut in the butter with a pastry blender or in food processor until the mixture resembles coarse meal. Sprinkle over the blueberry mixture.
Bake for 30 minutes or until bubbly. Top each serving with 1/4 cup frozen yogurt.