Grandma Linda's Banana Bread

What can increase the protein and fiber of a dessert bread?  Melissa suggests that everyone try Grandma Linda's Banana Bread recipe with whole wheat flour from the awesome cookbook Aunt Sheryl put together a couple years ago.  Whole wheat flour is a little heavier than bleached white flour, so it may take a pinch more leavening (baking soda or baking powder).  Plain (or vanilla) Greek yogurt is also a perfect substitute for sour cream.  Thanks Melissa!