In a medium bowl, combine all filling ingredients. Stir well.
Make crust: In a large bowl, combine baking soda, flour, oat bran, oats, cinnamon, and brown sugar. Stir in melted margarine. Press slightly more than half of crust mixture in bottom of a 9- by 13-inch pan sprayed with vegetable cooking spray. Spread on filling. Sprinkle on remaining crust.
Bake at 325 degrees for 20 minutes. Cut into bars.
Yield: 24 BarsRecipe submitted by Ron on 11/14/00