Zest 1 lemon, set the lemon zest aside. Then juice the lemon(s) using a citrus juicer.
In a mixing bowl, whisk together eggs, coconut oil, honey, and lemon juice.
In a separate bowl, mix almond flour, 1/4 cup tapioca flour, and baking soda. Make sure there is no clump left. Combine the wet and dry ingredients gently with a spatula.
Wash and dry the blueberries then coat it with 1 - 2 tsp of tapioca flour**. Then fold in 3/4 of the blueberries and lemon zest. Spoon the batter into the prepared muffin cups, filling them close to the top. Add the rest of the blueberries on top.
Bake 14 - 16 minutes in the oven. A toothpick inserted into the center of a muffin should come out clean.
Notes
**Toss blueberries in 1 tsp tapioca flour before adding into the batter to prevent them from sinking to the bottom.
Make sure your oven temperature (I use an oven thermometer)is accurate to prevent over-baking the muffins which results in dry muffins.