Heat oven to 350 degrees. Spray a 15-by-10-inch jelly roll pan or rimmed baking sheet with no-stick cooking spray. In large bowl, combine oat bran and oats; mix well and set aside.
Put margarine in 2-cup microwavable bowl. Microwave on high (100 percent power) 30 to 45 seconds or until melted. Add remaining ingredients; mix well. Drizzle over combined cereals, stirring until evenly coated; spread evenly in pan.
Bake 25 to 30 minutes or until golden brown, stirring every 10 minutes. Cool granola in pan on wire rack. Store tightly covered.