Prepare the pan: Preheat oven to 350°F (175°C). Line an 8x4-inch loaf pan with parchment paper, leaving overhang on the sides. Spray lightly with cooking spray.
Squeeze the zucchini: After shredding the zucchini, place it in a clean kitchen towel or cheesecloth. Squeeze hard to remove as much liquid as possible (you should get 2-3 tablespoons of liquid). This step is crucial to prevent soggy bread.
Blend wet ingredients: Add bananas, squeezed zucchini, egg, honey, and vanilla extract to a food processor or electric mixer. Blend on high for 30-45 seconds until completely smooth, pale, and fluffy with no banana chunks.
Mix dry ingredients: In a large bowl, whisk together almond meal, powdered peanut butter, baking soda, cinnamon, nutmeg, and salt. Break up any clumps to ensure even distribution.
Combine wet and dry: Pour wet ingredients into the dry ingredients bowl. Gently stir with a spatula until just combined. Don't overmix—small lumps are fine. Fold in 1/3 cup chocolate chips.
Fill the pan: Transfer batter to the prepared loaf pan and smooth the top. Sprinkle crushed pecans and extra chocolate chips over the surface, pressing lightly to stick.
Bake: Bake for 45-55 minutes, or until a toothpick inserted in the center comes out with just a few moist crumbs. The top should be golden brown and spring back when pressed gently.
Cool: Let the bread cool in the pan for 30 minutes on a wire rack. Use the parchment paper to lift it out, then cool completely on the rack before slicing.