How to Make It
Preheat oven to 350°F. Coat a 9- x 5-inch loaf pan with baking spray.
Place eggs in a large bowl; lightly whisk. Add granulated sugar, oil, vanilla, and 1 tablespoon of the orange zest; whisk until smooth. Stir in grated zucchini.
Whisk together flours, baking soda, baking powder, and salt in a medium bowl just until combined. Add flour mixture to egg mixture, stirring just until combined. Set aside 2 tablespoons of the pine nuts; stir remaining pine nuts into batter. Scrape batter into prepared pan; smooth top with spatula. Bake in preheated oven until a wooden pick inserted in center comes out clean, 55 minutes to 1 hour.
Cool bread in pan on a wire rack 15 minutes. Run a knife around the edges of pan to loosen bread. Remove bread from pan, and cool completely on rack, about 1 hour.
Whisk together powdered sugar, cream, and remaining 1 teaspoon zest until smooth. Drizzle glaze over cooled bread. Sprinkle evenly with reserved pine nuts.