Preheat the oven to 180ºC/350ºF/Gas4. Carefully grease a 7″ bundt tin using margarine or butter, taking care to get into all the creases and folds so your cake doesn't stick to the tin!
Add the Stork and sugar into a mixing bowl or stand mixer, and cream them together until they're light and fluffy.
In a separate bowl or jug, crack the eggs and whisk gently. Add the eggs to the Stork and sugar, and mix well.
Peel, core and grate the apples. Add the grated apple to the mixture and incorporate well.
Add the flour and cinnamon. Mix until only just combined - be careful not to overmix. Pour the cake mixture into the prepared bundt tin, and bake for 35-40 minutes or until the sponge is cooked through. (The sponge is cooked through when a skewer inserted into the centre of the cake comes out clean.)
When the cake is cooked, take it out of the oven and leave it to cool in its tin for 10 minutes. After 10 minutes, gently bang the sides of the tin and tip the cake out onto a serving plate or cake board.