Step 1Place pulp in large mixing bowl and sprinkle with baking soda.
Step 2Add sugar, oil, egg, flour, cinnamon, cloves, nutmeg, salt, walnuts and raisins and mix well.
Step 3Place batter in greased 13x9-inch baking pan. Bake at 350 degrees until toothpick inserted in center of bars comes out clean, 35 to 40 minutes. Dust with powered sugar. Cut into bars when cool. Garnish each bar with walnut piece.