Preheat oven to 400degrees. In a large bowl, whisk the first six ingredients. Cut in butter until mixture resembles coarse crumbs. Stir in oats and blueberries. In another bowl, whisk yogurt and 1 tablespoon milk until blended; stir into crumb mixture just until moistened., Turn onto a lightly floured surface; knead gently 10 times. Divide dough in half; pat each into a 7-in. circle. Cut each into eight wedges. Place wedges on a baking sheet coated with cooking spray. Brush tops with remaining milk. Sprinkle with coarse sugar., Bake 13-15 minutes or until golden brown. Serve warm.