1: In a bowl, mix together the flour, butter, sugar, egg, and baking powder until a dough forms.
2: Roll out the dough and line a tart pan with it.
3: Spread the apricot jam over the crust.
4: Bake in a preheated oven at 180°C for about 45 minutes.
5: Once cooled, dust with powdered sugar before serving.
