Preheat your oven: Start by preheating your oven to 350°F (175°C). Prepare your loaf pan (7.75 x 3.75 inch or 8 x 4 inch) by lightly greasing it or using parchment paper for easy removal.
Mix dry ingredients: In a large mixing bowl, whisk together 1½ cups all-purpose flour, ½ cup almond flour, 1 Tbsp cornstarch, ½ tsp salt, 3 tsp baking powder, ½ cup sugar (or monk fruit), and 1 tsp pumpkin pie spice or cinnamon until well combined.
Blend wet ingredients: In another bowl, mix together ¾ cup mashed ripe bananas, ¾ cup pumpkin puree, ½ cup light olive oil, and ¼ cup unsweetened almond milk. Ensure the mixture is smooth and well blended.
Combine mixtures: Gently fold the wet ingredients into the dry ingredients using a spatula or wooden spoon. Mix until just combined; be careful not to overmix, as this can lead to a denser bread.
Pour and garnish: Pour the batter into the prepared loaf pan, spreading it evenly. For an added touch, lay halved banana slices on top for decoration and extra flavor.
Bake: Place the loaf pan in the preheated oven and bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean. If the top starts to brown too quickly, you can cover it loosely with aluminum foil during the last 15 minutes of baking.
Cool and enjoy: Once baked, remove the pan from the oven and let it cool in the pan for about 10 minutes. Then, transfer the bread to a wire rack to cool completely before slicing.