Preheat the oven to 180°C/160°C fan.
Grease a 2lb loaf tin and line the bottom with greaseproof paper.
Weigh out the chia and flax seeds into your grinder
Finely mill the chia and flax seeds.
Mix together the flours, ground chia & flax seeds, bicarbonate of soda, ginger, cinnamon, mixed spice, nutmeg, star anise and salt in a large bowl.
Melt your aqua faba if it’s frozen – and then whip well until it’s 10 times the volume and has stiffish white peaks – set to one side.
If the ginger is not already chopped, chop finely
If you are adding the crystallised or stem ginger, stir two-thirds of it into the dry ingredients, saving the rest to sprinkle over the top of the cake. It helps to keep it separate if you dust the ginger with some of the flour mixture.
Place the vegan butter, golden syrup, treacle/molasses and brown sugar in a saucepan
put over a very low heat, stirring until melted then whisk in the milk.
Pour the butter mixture into the dry ingredients begin mixing with the electric whisk on a lowish speed.
After a bit of mixing add in the whipped aqua faba and continue mixing. until no dry lumps remain.
The batter will be quite liquid.
Pour the batter into the loaf tin and scatter over the rest of the ginger.
Bake for about 60 minutes until a skewer inserted into the centre comes out clean.
Leave the cake to cool in the tin for about 30 minutes then carefully turn it out onto a wire rack and leave to cool completely.