Lightly butter a 9-inch Bundt pan. Beat butter and Sugar; add egg and egg whites one at a time beating on high speed of electric mixer for 2 – 3 minutes. Combine orange and lemon zest, flour, baking powder, soda, cream of tartar and salt. In blender whip lemon juice, milk and tofu until tofu is smooth; add alternately with flour mixture to Sugar mixture, beating only until smooth after each addition. Spoon into prepared pan and bake at 375 degrees F for 30 to 35 minutes or until tester comes out dry. Remove to cool on baking rack. Glaze 1/2 cup white chocolate wafers* 2 tablespoons orange juice