Preheat the oven to 190C/375F/gas mark 5
Use a 20cm/8 inch sandwich tin.
Oil and line the cake tin. Cream the margarine and sugar together for 5 minutes or until light and fluffy. Stir in the apples. Mix together the flours, wheat germ, cinnamon, baking powder and sultanas. Stir this into the creamed margarine and apples and add the soya milk and lemon juice plus a little water if the batter is too thick. Pour the batter into the sandwich tin. Bake for 40 minutes to 1 hour in the preheated oven. The cake is baked when a warm knife inserted into it comes out clean. Remove the cake from the tin and allow to cool on a wire rack.