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.