Heat oven to 350°F. Spray 8-inch glass baking dish with cooking spray. In large bowl, combine oats, sugar, raisins, cinnamon and salt; mix well. In medium bowl, combine milk, egg whites, oil and vanilla; mix well. Add to dry ingredients; mix until well blended. Pour into baking dish. Bake 55 to 60 minutes or until center is set and firm to the touch. Cool slightly Serve topped with milk or yogurt and fruit, if desired. Store leftover oatmeal tightly covered in refrigerator.