Apricot and coconut jam bars

Egg: 1 pc
Salt: a pinch
Vanilla sugar: 8 grams
Sugar: 60 grams
Oil: 50 ml
Cornstarch: 2 tablespoons
Yogurt: 2 tablespoons
Baking powder: 1/2 teaspoon
Flour: 250 grams
Apricot jam: 160 grams
Coconut flakes: 2 tablespoons
Icing sugar (for garnish)
Instructions:

Preheat oven: Preheat oven to 180°C (356°F).
Make the dough:
In a large bowl, whisk together the egg, pinch of salt, vanilla sugar and sugar until well combined.
Add the oil, cornflour and yoghurt and mix until smooth.
Sift in the baking powder and flour, mixing until the dough comes together into a soft dough.
Shape the dough:
Press the dough evenly into a greased or parchment-lined baking tin (approximately 20x20cm).
Add the filling:
Spread the apricot jam evenly over the dough.
Sprinkle the coconut flakes over the jam layer.
Bake: