Preheat oven to 350 degrees F. Spray a 9×5 loaf pan with cooking spray or add a piece of parchment paper to the pan (keep side pieces long to use as handles).
Beat eggs in a medium mixing bowl. Add apple cider vinegar, honey, avocado oil and water to the bowl (not necessary to mix).
Add cassava flour, salt and baking powder to a large mixing bowl. Whisk to combine. Gradually add the wet ingredients into the dry ingredients in the large bowl and stir to combine, breaking down larger lumps.
Pour the batter into prepared loaf pan and place in preheated oven for 1 hour.
Remove from oven. Carefully remove bread from loaf pan and place on a cooling rack to cool for 1 hour before cutting.
Allow bread to come to room temperature (at least 2 hours) before placing in an airtight container.