preheat the oven to 165° C
peel the apples
1100 g apples
cut the apples into wedges, remove the core and cut the wedges with a sharp knife into slices 2 to 3 mm thick, or remove the core with an apple corer from the whole peeled apples and thus cut the apples into thin slices with a sharp knife, cheese slicer or mandolin
grease the cake tin well or line it with baking paper
sift flour, lupin flour, cornstarch and salt into a bowl; add the psyllium fibre to the flour mixture
180 g all-purpose flour, 25 g lupin flour, 15 g cornstarch flour, 2 g salt, 3 g psyllium fibres
mix everything well with a whisk so that all ingredients are evenly divided
melt the butter in a small saucepan or give it a quick blast in the microwave and pour into a measuring cup or hand blender cup
75 g butter
add the soymilk, silkentofu, sugar, vanilla sugar, grated lemon peel and lemon juice
200 ml soymilk, 85 g silken tofu, 130 g sugar, 1 tl vanilla sugar, 1 lemon, it's grated zest, 30 g lemon juice
mix everything with the hand blender and blend until silky smooth
pour the liquid part into the sifted flour mixture and mix quickly and vigorously with a whisk to make a smooth batter
pour the batter onto the sliced apple slices (or vice versa) and fold everything together well
pour the apple batter into the mould in portions, smoothing each time, flattening the appel slices and pushing the batter well into the corners of the cake tin, tapping the mould on the counter several times to get the air out, repeat until all the batter is in the tin
smooth the top of the cabatter with the back of a spoon or spatula
place the cake in the centre of the oven and bake for 1 hour until cooked and golden brown
let the cake cool completely in the tin for at least two hours before carefully tipping it onto a tray or the like
cut the cake into slices and serve with the red fruit sauce and possibly some plant-based whipped cream