Preheat oven to 325°F. Line 8-inch square baking pan with foil; spray foil with cooking spray. Whisk together oil, orange juice, orange zest and egg in small bowl. Combine remaining ingredients in large bowl; mix well. Pour in oil mixture; stir until all ingredients are moistened. Pour mixture evenly into prepared pan; press firmly. Bake for 30 to 35 minutes or until deep golden brown and set. Cool in pan for 15 minutes. Remove from pan by lifting foil; remove foil. Cut into bars while still warm. Serve warm or cool completely. Makes 8 bars. TIP: This mixture is a little sticky. To easily press into pan, spray bottom of metal measuring cup with cooking spray and press mixture with measuring cup.