Pre-heat your oven to 375°F (180°C).
In a small bowl add flaxseed and boiling water. Stir and set aside.
Next, combine the flour, sugar, salt, and baking powder in a large bowl.
In another bowl whisk together oil, milk, vanilla, lemon zest and lemon juice.
Add your flax egg to your oil mixture and mix well.
Pour the oil mixture into the centre of your flour mixture and start whisking in the centre making your way towards the edge until all the flour has combined
Mix until combined and the mixture is smooth, do not overmix.
Line your loaf tin with a layer of baking paper and brush the uncovered sides with a layer of oil.
Pour your mixture into the loaf tin and smooth out the top using a silicone spatula.
Bake at 375°F (180°C) for 55-60 minutes until golden brown and wooden skewer inserted in the middle comes out clean.