Preheat the oven to 400 °F. Grease and flour a 9-inch bread pan. Grease a small loaf pan (about 8x4 inch) with nonstick spray.
In a blender or food processor combine bananas, juice concentrate, oil, eggs, and vanilla. Blend until smooth.
In a large mixing bowl, combine flour, flaxseed, oats, cinnamon, nutmeg, baking powder, and baking soda. Stir to mix.
Gently stir the banana mixture into the flour mixture, just until thoroughly blended; do not overmix. Gently fold in walnuts.
Spoon batter into prepared pan. Bake for 35 to 50 minutes, until a toothpick inserted into the center, comes out clean. Let cool for 5 minutes before portioning.
To serve: Cut the bread into slices and butter. Enjoy with apple slices and milk.