For the applesauce, wash, peel, core and dice apples. Put apple juice, lemon juice, vanilla sugar, sugar and apples in a pot, bring to the boil and simmer at low heat (depending on the type of apple) for 10-15 minutes, stirring several times.
In the meantime peel and finely grate the onion. Wash, peel and coarsely grate the potatoes thoroughly. Mix onion, potatoes, eggs, salt and flour. Heat some clarified butter in a large pan.
From the potato mixture, place 3 buffers in the hot fat with a tablespoon and fry over medium heat for 2-3 minutes on each side. Remove from the pan and keep warm. Process remaining lard and potato dough in the same way.
Serve potato pancakes with apple sauce. Garnish with mint to taste. Serve with sugar beet syrup.