Add lemon/orange zest and rolled oats to a large mixing bowl. Transfer the blended mixture to the bowl and mix well. Cover and rest for 20 minutes.
1 tsp lemon or orange zest, 80 grams rolled oats
In a separate bowl, whisk together whole wheat flour, almond flour, baking powder, baking soda, and salt.
120 grams whole wheat flour, 28 grams almond flour, 1½ tsp baking powder, ½ tsp baking soda, pinch of salt
Add dry ingredients to wet and fold together until just combined. Add blueberries and fold a few more times to distribute.
1 cup blueberries
Transfer batter to lined loaf pan, packing down well to prevent large air bubbles. Bake for 60-70 minutes, until a skewer inserted in the center of the loaf comes out with a few moist crumbs.
Let the bread cool in the pan for 10 minutes, then use the parchment paper to carefully remove the bread from the pan. Place the bread directly on a wire rack to cool.