1. Mix prunes and banana in food processor until combined well. Stir in milk, orange juice, egg and orange peel.
2. In a separate bowl, mix oat bran,oats, flour, brown sugar, baking powder and cinnamon. Make a well in the center of dry ingredients and pour in prune/banana mixture. Stir until combined.
3. Fill 12 paper-lined muffin tins 2/3 full and bake at 400 degrees F for about 20 minutes or until centers spring back when pressed.