Heat oven to 400°F. Spray 12 muffin cups with nonstick cooking spray, or line muffin cups with paper baking cups and spray paper cups with nonstick cooking spray.
In large bowl, combine flour, oats, brown sugar, baking powder, cinnamon and salt; mix well.
In small bowl, combine milk, oil and egg whites; blend well. Add to dry ingredients all at once; stir just until dry ingredients are moistened. Stir in carrots and zucchini just until blended. Spoon batter evenly into sprayed muffin cups.
Bake at 400°F. for 16 to 21 minutes or until muffins are golden brown and toothpick inserted in center comes out clean. Immediately remove from pan. Serve warm.