For the dough, scrape out the vanilla pods, along with the quark, margarine, powdered sugar, eggs, salt, rubbed off. Knead the orange peel, flour and baking powder into a loose dough.
For the filling, finely chop the speculoos and grind the hazelnuts. Knead the raw marzipan mixture with the egg and orange juice to a smooth mass. Mix in the nuts, the speculoos and the pistachios.
Halve the dough, roll out each half into a square and brush with half of the speculoos mixture. Roll up the pieces of dough and place each in a greased stollen mold with the seam up. Overturn the stollen form on a baking sheet.
Bake in a hot oven at 200 ° C for 45 minutes, after 35 minutes remove the stollen form and brush the stollen with melted butter.