Hungarian Gerbeaud Slice (Zserbó) – Walnut Jam Layer Cake Bars

Ingredients:

For the dough:

• 500 g all-purpose flour
• 250 g butter, softened
• 50 g sugar
• 1 egg
• 150 ml milk
• 7 g dry yeast
• A pinch of salt

For the filling:

• 300 g ground walnuts
• 200 g apricot jam
• 150 g sugar

For the topping:

• 150 g dark chocolate
• 1 tbsp oil or butter