Preheat your oven to 180c and grease and line a loaf pan with baking paper.
In a large mixing bowl, add your caster sugar and olive oil, creaming these together until pale and fluffy looking.
Whisk in your non dairy milk, cider vinegar and mashed banana.
Sift your dry ingredients, then fold these together with the wet mixture until fully combined.
Pop the pistachios into a food processor or high speeder blender and blitz to form a fine crumb. Stir these into the cake batter.
Transfer the mixture into the loaf tin and pop this into the oven for 45-50 minutes until cooked through. Allow your loaf to cool in the tin for 5 minutes, then transfer wire wrack.
Once your cake has completely cooled, garnish with a frosting or toppings of your choice.