Spray two 8×4 inch loaf pans with nonstick cooking spray and set aside.
In a large mixing bowl, whisk together eggs, applesauce, maple syrup, Greek yogurt and canola oil.
In a separate medium bowl, combine whole wheat flour, all-purpose flour, ground flaxseed, ground cinnamon, baking soda, baking powder, nutmeg and salt. Add mixture of dry ingredients to wet ingredients and stir them together. Fold in walnuts.
Pour evenly into prepared pans and bake for 50-60 minutes or until a toothpick inserted in the center of the loaves comes out clean or with a few crumbs.
Garnish with whole walnut halves, slice and serve.