Put the flour in a bowl and press a depression in the middle. Crumble yeast into it. Heat 100 ml milk and add it together with 1 tbsp. sugar to the yeast. Mix with some flour from the rim to a thick mash. Cover and leave to rise in a warm place for about 15 minutes
Heat 150 ml of milk. Add milk, 85 g sugar, eggs, fat in pieces and salt to the pre-dough and knead everything well. Cover and leave to rise in a warm place for about 15 minutes
In the meantime peel apples. Coarsely grate apples, except for the core, mix with lemon juice and grappa and knead into the dough. Leave to rise for another 30-40 minutes. Heat the frying fat in a pot (medium heat approx. 160 °C). With 2 floured tbsp., cut small doughnuts from the dough and bake in portions in hot fat for about 5 minutes until golden brown
Mix 150 g sugar and cinnamon. Drain the finished doughnuts well on kitchen paper and roll them in the sugar mixture. Serve the doughnuts still lukewarm if possible. Vanilla sauce tastes good with them
Waiting time approx. 1 hour