Preparation

Preheat oven to 350°F. Lightly coat a 9-inch loaf pan with nonstick cooking spray. Reserve.Put flour, nuts, baking powder, baking soda and salt into the large work bowl fitted with the large chopping blade. Pulse to combine, about 5 times. Transfer to a medium-size bowl and reserve.Process banana on High until puréed, about 30 seconds. Scrape down the sides. Add eggs, egg whites, sugar, yogurt, butter and vanilla extract. Process on High until well combined, about 10 to 15 seconds. Add reserved dry ingredients. Pulse until flour is just mixed in, about 5 to 6 times.Pour batter into prepared pan. Bake until golden brown and a toothpick inserted into the center comes out clean, about 50 minutes.Cool in pan on a wire rack for 20 minutes.  Remove from pan and cool completely