For the sauce, stir 50 ml milk, cornstarch and egg yolk until smooth. Boil up the rest of the milk, vanilla pulp, 30 g sugar and salt. Stir in the cornflour and cook for about 1 minute in the residual heat. Let it cool down. Meanwhile, for the batter, mix the eggs with the whisk of the hand mixer.
Add the rest sugar, salt and wine and mix well. Mix flour and pudding powder, sieve onto the egg-wine mixture and stir in. Let the dough swell for about 15 minutes. In the meantime wash and peel apples and remove core with an apple corer. Cut apples into 5 slices each. Sprinkle with lemon juice. Heat the oil in a large pot. Dab apple rings dry, pull them through the dough and deep-fry them in portions in the hot oil until golden while turning. Lift out with a skimmer and let it drip off on kitchen paper.
Sprinkle with lemon juice. Heat the oil in a large pot. Dab apple rings dry, pull them through the dough and deep-fry them in portions in the hot oil until golden while turning. Lift out with a skimmer and let it drip off on kitchen paper. Dust with icing sugar as desired and serve decorated with lemon balm. Add the sauce in a small bowl