Prepare the pasta dough by forming a fontanel of flour and semolina on the pastry board. Add eggs and a pinch of salt. Gently mix eggs and flour with the help of a fork. Knead the dough with a kneading machine for ten minutes and add water if necessary. Wrap the smooth and homogeneous dough in cling film and let rest for half an hour.
Wash and dry the potato and prick the peel with the prongs of a fork. Wrap in cling film and boil in the microwave (700 watt) for about 8 minutes. Remove the cling film, peel it and mash with a fork. Peel the apples, remove the core and grate coarsely with a grater.