Put all ingredients in a blender and mix well. If you don`t have a mixer, you can grate the zucchini very small by hand and fold in the remaining ingredients.
Preheat the oven to 180 ° C (top / bottom heat). Pour the mixture into a springform pan (approx. 24 cm) and cover with the chopped apple. Then sprinkle some cinnamon over the cake.
Bake the cake at 180 ° C in the middle of the oven for about 20 minutes.