Step 1

Preheat oven to 350°F. Lightly spray a 8 x 4 loaf pan with baking spray.

Step 2

In a medium bowl, combine flour, baking soda and salt with a wire whisk. Set aside.

Step 3

In a large bowl cream butter and sugar with an electric mixer. Add egg whites, bananas, apple sauce and vanilla, and beat at medium speed until thick. Scrape down sides of the bowl.

Step 4

Add flour mixture and blend at low speed until combined, do not over mix.

Step 5

Fold in the blueberries and pour batter into the prepared loaf pans; bake in the center rack for about 50 to 55 minutes, or until a toothpick inserted in the center comes out clean.

Step 6

Let the pan cool at least 20 minutes, bread should be room temperature before slicing.