Preheat the oven to 180C and line or grease a loaf tin before starting.
Combine the buckwheat flour, coconut flour, psyllium husks, baking soda and sea salt in a large bowl.
Make a well in the middle of the dry ingredients and pour in the eggs, vinegar, oil, honey and coconut milk and mix well.
Pour batter into your loaf tin.
Bake at 180°C for 30 minutes.