Preheat oven to 350 degrees F. Grease and flour a 10-inch tube pan.

In a bowl, combine flour, baking powder, spices, baking soda, and salt. Set aside.

In another bowl, beat eggs until light. Gradually beat in brown sugar and honey until mixture is light and fluffy. Slowly beat in oil. At low speed or with rubber spatula, stir in flour mixture alternately with yogurt. Lightly but thoroughly stir in zucchini, walnuts, banana, and orange zest.

Turn batter into prepared pan. Bake for 50 to 60 minutes. Cool for 10 minutes, then invert on rack and remove from pan. Cool completely. Spread with Cream Cheese Honey Glaze or dust with confectioners’ sugar.