Drain pears, reserving syrup; reserve 1 pear half for topping. Process remaining pears halves in blender or food processor until smooth; transfer to 1 cup measure. Add as much of the reserved syrup as needed to make 1 cup. Mix flour, granulated sugar, baking powder, salt, and nutmeg in large bowl. Mix pear puree, oil, egg and orange rind in med. Bowl. Add to flour mixture; stir just until moistened. Fold in walnuts; batter will be stiff.

Spoon into greased 8 1/2x 4 1/2 pan. Cut reserved pear into 6 slices; arrange crosswise in a row on top of batter. Bake 350* 50 to 55 minutes or until a tooth pick inserted near the middle comes out clean. Cool in pan on wire rack 5 minutes.

In a small bowl, mix powdered sugar and as much orange juice as needed to make thin, smooth glaze. Remove from pan; spoon glaze on top of bread. Cool completely on wire rack. Wrap bread in aluminum foil: let stand over night before slicing.