Preheat oven to 350º Spray 8 x 4 inch loaf pan with nonstick cooking spray; set aside.
Combine prunes, raisins and prune juice in a small saucepan. Bring to a boil over medium-high heat. Remove from heat; let stand 5 minutes.
Combine all-purpose flour, whole wheat flour, baking powder, cinnamon, baking soda, ginger, allspice, and salt in medium bowl. Combine egg whites, molasses, oil and vanilla in a small bowl. Add to flour mixture and stir until just blended. Add prune mixture; stir until moistened.
Pour batter into prepared pan. Bake 55 to 60 minutes or until toothpick inserted near middle comes out clean. Cool in pan on wire rack, 10 minutes.
Turn bread out onto wire rack. Cool completely.