Beat the margarine, sugar, salt and vanilla sugar until frothy, then stir in the flour mixed with baking powder and the soy milk alternately. Add lemon zest.
Pour the dough into a greased springform pan (28 cm diameter).
Peel, halve and core the apples, cut into the length several times and press into the dough. The apples can also be cut into wedges and placed on the cake.
Bake the cake at 170 ° C for approx. 50 - 55 minutes (make a stick test).
Tip: Spread apricot jam on cake while it is still warm, it tastes particularly good.