Mix the ricotta cheese (quark), sugar, vanilla sugar, salt, olive oil, apple juice and the peeled and grated apples.
Mix the flour and baking powder together and add to the ricotta mixture.
Form a loaf and place it on the baking tray and brush with egg yolk.
Bake at 180° for about 20 minutes.
Read here why this sweet curd pastry is traditionally baked on "Martini", St. Martin's Day!