Spread the dough on a lightly greased baking sheet. Spread a layer of apricot jam on it.
Heat butter, sugar, and a touch of vanilla in a saucepan until the sugar dissolves. Sprinkle the delicious Rieser hazelnuts and combine with a little water to form a homogeneous mass. Place this nut mixture on the prepared dough.
Bake in the oven at a cozy 175°C for about 25 minutes until golden brown. While still warm, cut into rectangular pieces first, then into triangular shapes, and dip the tips into the icing or chocolate glaze.