Method:
Preheat oven to 350°F. Lightly oil an 8-1/2- x 4-1/2-inch loaf pan.
In a large bowl, whisk together whole wheat pastry flour, amaranth flour, baking powder, baking soda and salt. In a separate bowl, whisk together bananas, eggs, yogurt, oil and sugar. Add banana mixture to flour mixture and stir just until combined. Fold in 1/2 cup walnuts. Pour batter into prepared pan and top with remaining 1/4 cup walnuts.
Bake 1 hour or until bread is golden brown and a toothpick inserted in the center of the loaf comes out clean. Let cool slightly then loosen sides from pan, remove loaf and serve warm or let cool completely before serving.