Peel the kiwi, cut in half lengthways and cut into pieces. Wash grapes and cut in half. Cover and cook the apple juice, woodruff syrup, 150 g kiwi pieces and lemon zest for 1 minute. Then puree briefly.
Mix the vanilla pudding powder and lemon juice until smooth (add a little more water if necessary), add to the liquid and bring to the boil again. Mix in the remaining pieces of kiwi and let cool.