Place walnuts in a food processor, process until finely ground.
Gently spoon flours into dry measuring cups, level with knife. Mix flours, baking powder, baking soda and salt in a medium bowl, stir well with a whisk. Stir in ground walnuts. Make a well in center of mixture.
Combine brown sugar, oil, vanilla, yogurt and egg in a small bowl, add to the flour mixture, stirring just until moist. Fold in diced pear.
Spoon the batter into 15 muffin cups coated with cooking spray. Mix together sugar, cinnamon and ginger powder in a small bowl. Sprinkle batter with cinnamon/ginger sugar. Bake at 400*F. for 20 minutes or until muffins spring back when touched lightly in center. Remove from pans right away. Place on wire rack. Serve either warm or at room temperature. Enjoy1.