Line the base and sides of a 1kg/ 2lb loaf tin with baking parchment, making sure the paper comes up about 3 cm/1 inch higher than the tin.
Combine the flour, sugar, bicarbonate of soda, salt, raisins or sultanas, ground cinnamon, 3/4 of the granola and 3/4 of the apple in a large mixing bowl.
In a jug mix the non-dairy milk with the vinegar and leave for a couple of minutes to curdle slightly. Then stir in the oil.
Pour into the flour mixture and stir until just mixed together. Do not over mix.
Pour the batter into the tin and scatter the remaining granola and apple over the top.
Bake in the centre of the oven for 30 minutes then cover loosely with foil and bake for a further 35-40 minutes until golden and a skewer inserted into the centre of the cake comes out clean
Allow to cool for 10 minutes before turning out, removing the paper and leaving to cool completely on a wire rack.
See my Instagram feed @billys_kitchn for more OMS friendly recipe ideas.