Preheat the oven to 350 °F. Line a 9x4 inch loaf pan with parchment or a silicone liner.
In a large bowl, whisk together oat flour, flaxseed, baking powder and salt.
In a medium bowl, combine water, honey and eggs.
Pour the wet ingredients into the dry and mix until just combined.
Pour the batter into the pan and shake it lightly back an forth to help it settle in an even layer. Bake for 45-50 minutes until a toothpick inserted comes out mostly clean and the loaf bounces back slightly when you press on the center. If the top appears to be browning too quickly, you can tent it with aluminum foil.If you have an instant read thermometer, the center should measure 200-205 °F.*TIP: Place your oven rack in the bottom third of the oven so that the top of the loaf doesn't brown too quickly.
Allow to cool in the pan on a wire rack for 15 minutes and then use the parchment/liner to lift the loaf out and move it to a wire rack to cool completely. Once cool, slice and enjoy!
Notes
LeftoversCool leftover loaf completely and store in an airtight container at room temperature for up to 3 days or freeze for up to 3 months.