Preheat the oven to 180°C, grease and line the base of a 9"x 5" loaf tin with baking parchment
Whisk the flour, almond meal, salt, baking powder and soda bicarb in a bowl.
In a larger, separate bowl, whisk together the egg, olive oil, honey and orange zest.
Now gently fold in the flour mixture in 3 batches, alternating with the orange juice. Mix in the walnuts.
Pour the batter into the prepared pan and bake for 60 minutes until a skewer inserted in the centre comes out clean without any wet batter.
Cool the cake for 10 minutes in the pan before turning out on a wire rack to cool.