1Heat oven to 400°F. Place paper baking cup in each of 12 regular-size muffin cups. or grease bottoms only with shortening or cooking spray.
2In small bowl, pour buttermilk over oats; set aside. In large bowl, mix oil, brown sugar and egg with spoon. Stir in flours, baking soda, cinnamon and salt just until flours are moistened. Stir in oat mixture; fold in blueberries. Divide batter evenly among muffin cups.
3Bake 15 to 20 minutes or until golden brown. Cool 5 minutes; remove from pan. Serve warm.